Dogs eating cat faeces (coprophagia) is extremely common and deeply unpleasant for owners, but rarely causes serious illness. The main risks are parasite transmission and bacterial exposure. The biggest concern is if the cat is on medication that could be harmful to dogs.
Specific Dangers
- Toxoplasma gondii — parasite shed by cats, rarely affects healthy adult dogs
- Roundworm and hookworm transmission if cat has parasites
- Giardia transmission
- Campylobacter and Salmonella in small amounts
- Medications in cat faeces — if cat is on methotrexate or other drugs, this can be very dangerous
Watch For These — Go to Vet If Any Appear
- Vomiting or diarrhea (usually mild if it occurs)
- Signs of cat medication toxicity if cat is on drugs
- Long-term: potbelly or weight loss (parasites)
- Usually no symptoms — most dogs are fine
📋 What to Do Right Now
Follow these steps immediately:
Frequently Asked Questions
Several theories — cat food is higher in protein and fat than dog food, making cat faeces more attractive. Some dogs have nutritional deficiencies. Others develop it as a learned habit.
Usually not seriously. The main risks are parasite transmission and the small chance of bacterial exposure. The exception is if the cat is on certain medications.
Methotrexate (cancer treatment) is the most serious. Digoxin (heart medication), certain antibiotics, and immunosuppressants can also cause issues. Always check.
Covered litter trays, elevated litter boxes, baby gates (with cat-sized opening), keeping litter areas out of dog access zones, and consistent 'leave it' training.
Discuss with your vet. If the cat's parasite status is unknown or the behaviour is frequent, a fecal test and deworming may be appropriate.