i think they do
Same as humans
Evolution.
Never give an animal a medication that is made for a human. Dogs have different systems from humans, and human medications may kill them or make them sick. Ask a veterinarian what to give your dog.
No, you cannot get pregnant from the sperm of a dog. Humans and dogs have different reproductive systems and cannot produce offspring together. Pregnancy can only occur between members of the same species.
No, its a different type of lice.
There are quite a few different dog viruses that are infectious to human beings. Other dog viruses die before they can infect humans.
Dogs have the same organ systems as humans.
because they just do
They are all different, just like humans.
well.... dogs have 4 legs and humans have 2.... dogs muscles are in different spots in their body than humans
DONG
ones from a dog and ones from a human