| Abbreviation | Definition |
|---|---|
| CALAS | Canadian Association for Laboratory Animal Science |
| CANL | Cold Advisory for Newborn Livestock |
| CAPA | Canadian American Pudelpointer Association |
| CAPM | Collection of Animal Pathogenic Microorganisms |
| CAPPDT | Canadian Association of Professional Pet Dog Trainers |
| CARE | Cincinnati Animal Referral & Emergency |
| CARE | Companion Animal Rescue Effort |
| CAS | Companion Animal Society (New Zealand) |
| CAST | Council for Agricultural Science and Technology |
| CAUZ | Consortium of Aquariums Universities & Zoos |
| CAVCM | Canadian Association of Veterinary Cannabinoid Medicine |
| CAVD | Canadian Academy of Veterinary Dermatology |
| CAVO | Canadian Association of Veterinary Ophthalmology |
| CAVT | Colorado Academy of Veterinary Technology |
| CAWC | Companion Animal Welfare Council |
| CBC | National Audubon Society Christmas Bird Count |
| CBPP | Contagious Bovine Pleuropneumonia |
| CBRA | California Biomedical Research Association |
| CBSG | Conservation Breeding Specialist Group |
| CBVH | Casco Bay Veterinary Hospital |