Our donor network.
Legacy Biome is built on one principle: exceptional donors create exceptional microbiomes. Our donor network consists of a carefully selected group of dogs and cats who we know by name.
WHY IT MATTERS
Microbiome integrity begins with donor integrity.
Our FMT products are sourced from a long-established, multi-generational lineage of dogs and cats, providing a stable and reliable foundation for superior microbiome diversity and gut health. Every donor in our network undergoes rigorous screening and testing to ensure the highest standards of safety, consistency, and microbiome quality.
About Our Donor Testing
Every batch starts with a healthy donor.
Every batch of FMT undergoes comprehensive safety screening and quality verification to ensure purity, consistency, and responsible sourcing. And it all starts with analyzing our donors to ensure they're at optimal health.
About our donor testing.
Every batch of FMT undergoes comprehensive safety screening and quality verification to ensure purity, consistency, and responsible sourcing. And it all starts with analyzing our donors to ensure they’re at optimal health.
- Parasite screen with Giardia
- PCR fecal screen
- Microbiome analysis
- Heartworm/ehrlichia/lyme/anaplasma with quantitative C6 antibody test
- Full-spectrum blood/urine/fecal panel
- Vaccine titers
- Diet analysis (if needed)
How donor testing supports our FMT products.
- Our FMT products are sourced exclusively from rigorously screened donor dogs and cats within our Legacy Donor Network.
- Each product is derived from a stable, multi-generational donor lineage to support consistency and microbiome diversity.
- We produce under strict quality-control protocols, including comprehensive pathogen screening and health monitoring.
- Donors maintain a nutrient-dense, minimally processed diet designed to support gut health.
- Donors are raised in a low-toxin environment that prioritizes natural health and microbiome preservation.
- Legacy Biome’s FMT products were developed to provide a balanced microbial community reflective of healthy canine and feline gut function.
What sets our donor dogs and cats apart.
What makes our approach different starts with who we choose as donors. Our selection process is designed to prevent the transmission of infectious agents while prioritizing donors with exceptional microbial diversity.
Nutrition
Balanced, nutrient-rich nutrition.
Our donor dogs and cats are fed a species-appropriate diet consisting of raw animal proteins and fresh organic foods, including carefully selected plant-based ingredients. This nutritional approach supports optimal health and promotes a resilient gut microbiome.
Care
Holistic, health-centric care.
Donors receive comprehensive, integrative healthcare and are raised in an environment free from unnecessary antibiotics, NSAIDs, pesticides, and chemical flea or tick treatments whenever possible. This approach helps preserve microbiome integrity and overall wellness.
Development
Natural microbiome development.
Our donors are minimally vaccinated, monitored through antibody titer testing, and birthed naturally, supporting the development of a robust and diverse gut ecosystem from an early age.
Wellbeing
Wellbeing-focused environment.
The health of our donors extends beyond physical care. They live in a loving, enriched environment with regular exercise, play, social interaction, and attentive care, supporting their comfort, happiness, and overall quality of life.
Dogs & Cats We Know by Name
Exceptional donors are the foundation of everything we make.
From screening to sourcing, every step traces back to a small network of healthy, well-loved animals. That's how we deliver a balanced, diverse microbiome in every capsule.
Shop FMT Now
Join our newsletter.
Gut health tips, new guides and updates, straight to your inbox.
Small-batch FMT from donors we know by name. For dogs and cats who need more than a probiotic.
LEARN
© 2026 Legacy Biome. All rights reserved.