If one pet has parasites, do all pets in the home need to receive treatment? - Countryside Veterinary Clinic
It depends on which parasite you're talking about. Suppose it's fleas, for sure. Any of the animals, including people, can get fleas on them. Ticks can spread from cats to dogs to people. Heartworms are generally transmitted from dog to dog, and it's always through a mosquito. So one dog can't give another dog heartworms unless, of course, it went through a mosquito first. Ringworm can be transmitted from one to the next. Mites (like ear mites) can go from one pet to the next. So it's vital that we figure this out right away, so we don't spread it throughout the family.
If one pet has parasites, do all pets in the home need to receive treatment? - The Drake Center for Veterinary Care
If one pet has parasites, do all pets in the home need to receive treatment? - Animal Hospital of Statesville
Sometimes yes, other times no. If we're talking about a litter of puppies, we'll deworm them all, but not necessarily when it comes to heartworms. We don't have to treat every pet for heartworm if we discover that one had them, but we recommend getting them on prevention. Tapeworms can be a yes or a no because a dog will not catch a tapeworm from another dog. They catch it from the flea that they ingest. So if you have pets that have fleas, they both have probably been exposed to a similar situation. They may both have tapeworms, but they didn't catch it from one another. So we use different treatments at different times.