Do dogs purr?

They don't. Cats do.

Usually this is classified as a "growl" in terms of a dog. The sound can be released from the back of the throat of the dog, which emits a low, rumbling noise that usually means contentment,...

Dogs produce noises on a frequency higher than human hearing. When happy, they make ultra high growling noises that are undetectable to humans. Cats, on the other hand, have a different physiology....

Dogs and cats have different responses to fear and pleasure. When dogs are happy they wag their tails. Cats purr when they are happy. When dogs are scared they growl. Cats also growl when they are...

in general, there could be two realistic answers to this. The first as a joke ... none, dogs don't have feet they have paws. The second answer forgiving the feet/paw issue and presuming you meant...