Is it harmful for dogs to eat poop?

Eating their own feces is generally not directly harmful, but exposes dogs to parasites, diseases, and social problems. Eating cat feces can transmit toxoplasmosis, and feces from wild animals may contain parasites or diseases. Medical issues causing coprophagia can be serious and require veterinary attention.

Why do dogs suddenly start eating poop when they never did before?

Sudden adult onset coprophagia typically indicates underlying issues: medical conditions, medication side effects, nutritional changes, stress or environmental changes, or parasite infestation. Veterinary consultation is strongly recommended to rule out underlying causes.

Can you train a dog not to eat poop?

Yes, training can reduce or eliminate coprophagia when combined with addressing underlying causes. Teach 'leave it' command, increase mental stimulation, manage environment, use taste aversion products, and address medical/nutritional causes with your veterinarian.