For many leaders in the Animal Health industry, success is measured by innovative products, business growth, or scientific breakthroughs. For Silja Schiller-Moumtzidis, however, success is measured differently. It is measured by the number of animals that never become homeless in the first place. As co-founder and CEO of Zero Stray Pawject and Zero Stray Academy, she has spent the past decade challenging one of the world’s most persistent animal welfare problems by shifting the conversation away from reactive solutions and toward prevention. Her work has helped transform municipal animal welfare programs in Greece, trained thousands of government officials and law enforcement officers, and produced an internationally recognized model that reduced the stray dog population on one Greek island by 90 percent in just three years.
Yet Schiller-Moumtzidis did not begin her career in Animal Health. Trained in economics and business administration, she built a successful international career with organizations including Johnson & Johnson, WPP, and Mars Petcare, leading complex business transformations across Europe, Asia, and the United States. Those experiences taught her how organizations solve problems systematically, how data can shape better decisions, and how sustainable change requires more than passion alone. During her appearance on The People of Animal Health Podcast with Stacy Pursell, founder and CEO of The VET Recruiter, Schiller-Moumtzidis explained how those seemingly unrelated experiences ultimately converged to create a new model for tackling pet homelessness that is now attracting attention around the world.
Growing Up in a Divided Berlin
Schiller-Moumtzidis’ worldview began taking shape long before she entered the business world. She grew up in West Berlin while Germany remained divided during the final years of the Cold War, an environment that exposed her at an early age to both political uncertainty and remarkable resilience. Although she was still a child when the Berlin Wall fell, she vividly remembers the atmosphere surrounding one of history’s defining moments and how dramatically life changed afterward.
Her parents also had a profound influence on the way she approached both business and science. Her father owned a shipping company, and she became fascinated watching him navigate the complexities of transporting goods through communist-controlled territories. Even as a young girl, she recognized that entrepreneurship often required creativity, persistence, and the ability to solve problems that had no obvious solution.
Her mother, meanwhile, pursued a very different career. As a nurse specializing in HIV care during the 1980s, she worked with patients at a time when fear, misinformation, and stigma surrounded the disease. Rather than allowing uncertainty to dictate her decisions, she approached every challenge through curiosity and scientific inquiry.
Looking back, Schiller-Moumtzidis believes those two influences became foundational to her career. “The combination of my father and my mother, entrepreneur and science, made me the person who I am today,” she reflected, noting that her lifelong love of animals completed the equation. That unique combination of entrepreneurial thinking, scientific curiosity, and compassion would eventually define both her leadership style and the mission she would later pursue.
Building a Career Outside Animal Health
Unlike many leaders who spend their entire careers within the Veterinary profession or Animal Health industry, Schiller-Moumtzidis initially followed a very different path. She earned a degree in economics and business administration, studying in both Germany and Paris before beginning her professional career at Johnson & Johnson.
Her first decade focused primarily on medical devices and pharmaceuticals, an industry undergoing significant transformation. During those years, healthcare companies began shifting away from blockbuster drugs and toward precision medicine, genomics, biotechnology, and the use of real-world evidence to guide treatment decisions. Working within that environment exposed her to the importance of understanding disease mechanisms, analyzing data, and designing solutions that addressed root causes rather than simply treating symptoms.
She credits much of her interest in disease prevention to the conversations she had growing up with her mother. Listening to stories about HIV patients and observing how medical science evolved to better understand complex diseases left a lasting impression. Rather than viewing illness as something to react to after it appeared, she became increasingly interested in understanding why diseases emerged in the first place and how they could be prevented.
Those experiences would later become surprisingly relevant when she entered Animal Health. Although the species and settings would change dramatically, she eventually realized that many of the same principles guiding human healthcare also applied to Veterinary medicine and animal welfare.
One Dog Changed Everything
While Schiller-Moumtzidis enjoyed a successful corporate career, one unexpected event completely altered the direction of her life. The turning point came in 2014 during what should have been one of the happiest weeks of her life—her wedding week in Greece. While there, she and her husband encountered a dog named Caprice.
They initially believed they were adopting a stray, only to later discover that Caprice had actually come from a hoarding situation involving severe neglect. The experience opened her eyes to a problem she had never fully understood before. Caring for Caprice required patience, extensive behavioral training, and significant medical attention. Over time, however, the once-abused dog not only recovered but eventually became a service dog.
More importantly, Caprice fundamentally changed Schiller-Moumtzidis’ understanding of pet homelessness. “There is one name,” she said when asked what inspired her career shift. “Caprice.”
She soon realized that pet homelessness was about far more than abandoned animals. It intersected with public health, public safety, responsible ownership, disease prevention, and community wellbeing. Every homeless dog represented a much larger systemic issue that had begun long before the animal ended up on the street.
Although Caprice passed away last year from old age, Schiller-Moumtzidis described him as the reason Zero Stray Pawject exists today.
“His legacy lives on,” she said.
From Shelter to Systems Thinking
Like many organizations addressing animal welfare, Zero Stray Pawject initially began with direct rescue efforts. The founders established a shelter and worked extensively with veterinarians to care for dogs suffering from complex medical conditions. Those early years provided invaluable experience, but they also exposed an uncomfortable reality.
Even exceptional shelters could never solve the overall problem by themselves. No matter how many animals were rescued, new stray dogs continued appearing. That realization forced Schiller-Moumtzidis to rethink the organization’s mission entirely. Rather than asking how more animals could be rescued, she began asking why they became homeless in the first place.
Her years in pharmaceuticals heavily influenced that shift in thinking. In human healthcare, major advances increasingly emphasized prevention, early intervention, and understanding disease pathways before illness developed. She wondered whether the same philosophy could be applied to pet homelessness.
Instead of focusing primarily on dogs already living on the streets, what if interventions occurred before abandonment happened? That question became the foundation for Zero Stray Pawject’s prevention-focused model.
“We shifted the focus toward prevention,” she explained. “To intervene before a dog or cat ends up stray or homeless.”
The concept may sound simple, but it represented a significant departure from many traditional animal welfare strategies.
Bringing Corporate Strategy into Animal Welfare
As Zero Stray Pawject evolved, Schiller-Moumtzidis found herself applying lessons she had learned throughout her corporate career. Whether leading projects at Johnson & Johnson, WPP, or later Mars Petcare, every successful initiative began with the same process:
- Define the problem.
- Collect meaningful data.
- Understand root causes.
- Develop targeted interventions.
- Measure outcomes.
She saw no reason animal welfare should operate differently.
“Over the last twenty years,” she explained, “I’ve worked in corporate strategy, marketing, sales, and general management. You learn a certain skill set. You need to understand the problem first, and then you need to find interventions to solve that problem.”
Rather than relying solely on emotion, Zero Stray Pawject began collecting large volumes of data, studying owner behavior, evaluating municipal systems, and identifying the specific factors contributing to pet homelessness.
That analytical approach distinguished the organization from many others working in the same space. Schiller-Moumtzidis emphasizes that compassion remains essential. However, she also believes sustainable solutions require objective analysis alongside empathy.
“You can only win if you can influence people,” she explained. “Even though we work in animal welfare, we’re dealing with people.”
Building Bridges Instead of Drawing Lines
Another defining feature of Zero Stray Pawject is its willingness to collaborate with groups that many advocacy organizations avoid. Schiller-Moumtzidis intentionally rejects an adversarial approach.
“We don’t draw any red lines,” she explained.
Instead, the organization actively partners with municipalities, veterinarians, law enforcement agencies, breeders, hunting associations, pharmacists, judicial leaders, and government officials. Some observers initially questioned why an animal welfare organization would collaborate with groups frequently criticized by advocates.
Her answer remains straightforward: real solutions require every stakeholder. Refusing to engage with people whose perspectives differ only guarantees that meaningful change becomes more difficult.
That philosophy later proved essential as Zero Stray Pawject expanded throughout Greece.
The Aegina Proof of Concept
Perhaps the organization’s most influential achievement began with a bold experiment on the Greek island of Aegina.
Following the initial shelter work, Schiller-Moumtzidis recognized the need for a contained environment where prevention strategies could be tested systematically. Aegina, home to approximately 20,000 residents and roughly 2,000 owned dogs, provided an ideal setting. Convincing local government officials proved challenging.
“We were just two people from New York,” she recalled, trying to persuade a Greek mayor to support an entirely new approach.
The mayor himself was not especially interested in animal welfare. What ultimately persuaded him was not an emotional appeal about homeless dogs. Instead, Schiller-Moumtzidis presented the issue as one affecting public health, public safety, and the community’s broader wellbeing.
Once municipal leaders agreed to participate, the team immediately established a technological foundation by creating a comprehensive dog registry that allowed owned animals to become traceable through microchipping and registration. Working alongside the municipality’s public health director, they then introduced a combination of education, financial incentives, and law enforcement.
Free veterinary services, subsidized microchipping, and subsidized sterilization programs encouraged responsible ownership, while police officers equipped with newly donated microchip scanners conducted neighborhood visits to verify compliance. At the same time, local veterinarians became central partners in expanding access to preventive care.
The strategy intentionally balanced encouragement with accountability.
As Schiller-Moumtzidis explained, education alone was insufficient. Some owners readily embraced responsible pet ownership once they understood its importance, while others required meaningful enforcement before changing long-standing behaviors.
The results exceeded expectations. Approximately 75 percent of owned dogs became registered and microchipped, more than half of owned dogs were sterilized through targeted interventions, and the production of new stray animals dropped dramatically. Combined with the continued efforts of shelters to care for existing homeless animals, the island’s stray dog population fell from roughly 300 animals to approximately 30 within three years.
The Aegina project would eventually become recognized internationally as a best-practice model, demonstrating that prevention, collaboration, and data-driven decision-making could dramatically reduce pet homelessness in a humane and sustainable way.
The success of the Aegina project demonstrated something that many people working in animal welfare had long suspected but rarely been able to prove with measurable data: preventing pet homelessness is far more effective than simply responding to it. For Silja Schiller-Moumtzidis, however, the results represented only the beginning. Once the proof of concept had been established, the next challenge became considerably larger. How could a successful local initiative be transformed into a scalable model capable of helping municipalities, governments, and organizations around the world? That question ultimately led to the creation of Zero Stray Academy, an educational platform designed to share the systems, strategies, and leadership principles that had made Aegina such a remarkable success. During the second half of her conversation on The People of Animal Health Podcast, Schiller-Moumtzidis discussed how education, collaboration, and data continue to drive her work while offering an optimistic vision for the future of both Animal Health and global animal welfare.
Turning One Success Story into a Global Movement
Following the dramatic improvements achieved on Aegina, municipalities from across Greece began asking how they could replicate the program in their own communities. Schiller-Moumtzidis quickly realized that simply sharing a written report would not be enough. Every municipality faced different political structures, financial realities, and cultural attitudes toward companion animals. What leaders needed was practical guidance on implementing the entire system, from gaining political support and engaging Veterinary professionals to educating the public and establishing meaningful enforcement mechanisms.
That realization inspired the creation of Zero Stray Academy, an educational initiative designed to help municipalities move beyond isolated interventions toward comprehensive prevention strategies. Rather than positioning itself as an advocacy organization that simply encouraged better animal welfare policies, the Academy focuses on teaching local leaders how to build sustainable programs capable of delivering measurable results.
As Schiller-Moumtzidis explained, meaningful change rarely occurs because people lack compassion. More often, it fails because organizations lack the knowledge, structure, and collaboration required to translate good intentions into lasting outcomes. The Academy therefore emphasizes practical implementation, providing municipalities with proven frameworks that have already demonstrated success in real-world settings. By documenting every stage of the Aegina project and identifying which interventions produced the greatest impact, Zero Stray Academy has been able to help other communities avoid many of the challenges encountered during the original pilot.
Why Education Alone Is Not Enough
One of the most important lessons Schiller-Moumtzidis has learned throughout her work is that education, while essential, cannot solve systemic problems by itself. Public awareness campaigns certainly improve understanding of responsible pet ownership, but lasting behavioral change requires a broader combination of incentives, accountability, and community engagement.
She explained that successful prevention depends on creating an environment in which responsible ownership becomes both easier and more widely expected. Educational programs help owners understand the importance of microchipping, sterilization, and proper Veterinary care, while affordable services remove financial barriers that might otherwise discourage participation. At the same time, effective enforcement ensures that individuals who consistently ignore their responsibilities understand there are meaningful consequences for doing so.
This balanced approach has occasionally surprised observers who assume animal welfare organizations focus exclusively on education or advocacy. Schiller-Moumtzidis believes that real progress requires integrating multiple disciplines rather than relying on any single solution. Human behavior is complex, and sustainable improvement almost always depends upon combining education, accessible services, supportive policies, and consistent enforcement into one coordinated strategy.
Building Unlikely Partnerships
Perhaps one of the most distinctive characteristics of Schiller-Moumtzidis’s leadership is her ability to build relationships among groups that do not always agree with one another. Throughout the interview, she repeatedly emphasized that solving large societal problems requires collaboration across sectors that traditionally operate independently.
Rather than viewing police officers, government officials, veterinarians, breeders, hunters, pharmacists, judges, and animal welfare advocates as separate constituencies, she sees them as essential participants within the same system. Each group influences responsible pet ownership in different ways, and excluding any one of them weakens the overall effort.
This philosophy has allowed Zero Stray Pawject to establish training programs for municipal employees, Veterinary professionals, police departments, and judicial authorities throughout Greece. Law enforcement officers receive instruction on identifying compliance issues and using microchip scanners effectively, while municipal leaders learn how to structure sustainable prevention programs within their own communities. Veterinary professionals contribute their medical expertise while also serving as trusted educators for pet owners.
Schiller-Moumtzidis believes these partnerships succeed because the conversations focus on shared objectives rather than ideological differences. Every participant ultimately benefits from healthier animals, safer communities, and fewer homeless pets. By keeping those common goals at the center of every discussion, Zero Stray Pawject has been able to build coalitions that many initially believed would be impossible.
Following the Data Wherever It Leads
Throughout her corporate career, Schiller-Moumtzidis learned that effective leaders must resist making decisions based solely on assumptions. That same discipline now guides nearly every initiative undertaken by Zero Stray Pawject.
“We always start with the data,” she explained during the interview, emphasizing that objective evidence frequently challenges conventional wisdom. Rather than assuming why pets become homeless or why particular interventions succeed, the organization continually collects information, measures outcomes, and adjusts its strategies based on real-world results.
One important lesson emerging from this research is that pet homelessness rarely stems from a single cause. Economic hardship, inadequate owner education, insufficient access to Veterinary care, weak enforcement of existing regulations, and cultural attitudes toward companion animals all contribute in different ways depending on the community. Consequently, solutions must remain flexible enough to address local circumstances while still following proven prevention principles.
Schiller-Moumtzidis believes this commitment to evidence has become one of the organization’s greatest strengths. Data not only improves decision-making but also helps build credibility with policymakers, municipal leaders, and potential funding partners. When leaders can clearly demonstrate measurable outcomes rather than relying solely on emotional appeals, they are far more likely to secure long-term support for prevention initiatives.
Prevention Is Reshaping Animal Health
Schiller-Moumtzidis sees important parallels between the evolution of human healthcare and the direction in which the Animal Health industry is moving today. During her years at Johnson & Johnson and later at Mars Petcare, she observed healthcare organizations placing increasing emphasis on prevention, early intervention, and population health rather than focusing exclusively on treating disease after it developed.
She believes Animal Health is undergoing a similar transformation.
Rather than viewing veterinarians primarily as providers of episodic medical care, the profession increasingly recognizes the value of preventive healthcare, continuous monitoring, nutrition, behavior, and responsible ownership throughout an animal’s lifetime. Advances in diagnostics, wearable technology, digital health platforms, and data analytics are making it possible to identify risks earlier while strengthening the relationships among pet owners, veterinarians, and Animal Health companies.
For Schiller-Moumtzidis, this broader preventive mindset extends naturally beyond disease prevention to include preventing homelessness itself. A healthy animal living in a stable home receives regular Veterinary care, contributes positively to its family and community, and avoids many of the welfare challenges associated with life on the streets. Prevention therefore benefits animals, owners, veterinarians, municipalities, and society as a whole.
Leadership Through Influence Rather Than Authority
Although Schiller-Moumtzidis now leads an internationally recognized nonprofit organization, she readily acknowledges that much of her work depends upon influencing people she does not directly manage. Municipal leaders, police officers, veterinarians, government agencies, and community volunteers all maintain independent responsibilities and priorities.
Success therefore requires a leadership style built on trust rather than authority.
Throughout the interview, she described leadership as the ability to help people recognize a common purpose and understand how their individual contributions support a larger mission. Instead of attempting to persuade others through emotion alone, she relies on carefully prepared evidence, thoughtful listening, and genuine collaboration.
Her years in corporate strategy proved invaluable in this regard. Large organizations rarely implement meaningful change because one executive simply issues instructions. Sustainable transformation occurs when people understand why change matters, believe the proposed solution will work, and feel personally invested in its success.
That same philosophy now guides every aspect of Zero Stray Pawject’s work.
Optimism About the Future
Despite the enormous scale of global pet homelessness, Schiller-Moumtzidis remains remarkably optimistic. She believes technological advances, stronger public awareness, and growing collaboration among governments, Veterinary professionals, Animal Health companies, and nonprofit organizations are creating unprecedented opportunities to address problems that once seemed insurmountable.
She also sees encouraging changes in public attitudes toward companion animals. Increasingly, communities recognize that responsible pet ownership is not simply an individual concern but an important component of public health, community safety, and overall quality of life.
Technology will continue accelerating that progress. Improved identification systems, digital registries, data analytics, artificial intelligence, and enhanced communication tools all have the potential to strengthen prevention efforts while allowing organizations to allocate resources more effectively.
Most importantly, Schiller-Moumtzidis believes the growing willingness of organizations from different sectors to work together represents a significant cultural shift. The challenges surrounding pet homelessness are simply too complex for any single organization to solve independently. Collaboration, rather than competition, will ultimately determine how much progress the global community achieves.
Lessons Learned Along the Way
Reflecting on her own career, Schiller-Moumtzidis acknowledged that she never anticipated following the path that ultimately led to Zero Stray Pawject. Her experiences across pharmaceuticals, consumer healthcare, communications, and Animal Health each provided skills that became unexpectedly valuable later in her journey.
She encourages professionals to remain open to opportunities that may initially seem unrelated to their long-term goals because diverse experiences often create unique perspectives. Looking back, she now recognizes that every stage of her career contributed something essential, whether it involved strategic planning, organizational leadership, marketing, scientific thinking, or business transformation.
She also emphasized the importance of remaining resilient when pursuing ambitious goals. Meaningful societal change rarely occurs quickly, and progress often requires patience, persistence, and the willingness to overcome setbacks that inevitably arise during complex initiatives.
Creating a Legacy of Prevention
As the conversation concluded, Schiller-Moumtzidis returned to the idea that has guided her work ever since adopting Caprice more than a decade ago. Lasting impact comes not from rescuing the greatest number of animals today but from creating systems that prevent animals from becoming homeless tomorrow.
That philosophy has transformed Zero Stray Pawject from a small nonprofit founded by two determined individuals into an internationally respected organization whose work now influences municipalities, governments, Veterinary professionals, and Animal Health leaders around the world.
Her vision extends well beyond Greece. She hopes that prevention-based strategies will eventually become the global standard for addressing pet homelessness, replacing fragmented responses with coordinated systems built on education, collaboration, accountability, and measurable outcomes.
For Schiller-Moumtzidis, that future is entirely achievable. The knowledge already exists, the tools continue to improve, and more organizations than ever before recognize that sustainable solutions require cooperation across every sector of society.
Ultimately, her journey demonstrates that some of the most significant advances in Animal Health begin not with new medicines or technologies, but with a willingness to ask different questions. By shifting the focus from reacting to homelessness toward preventing it altogether, Silja Schiller-Moumtzidis has challenged the global animal welfare community to rethink what success truly looks like—and in doing so, she has created a model capable of improving the lives of animals and the people who care for them for generations to come.