Yes, but not legally. The basic training is the same, and the concepts are the same. The training to become a vet is actually much more difficult as their is only one species of human, but there are dogs and cats and rabbits and horses, and so on. And it's actually more competitive and difficult to get into vet school! My good friend in college was not accepted into our highly regarded large animal vet program - but was offered a medical school post graduate slot. I suspect that in our sue-happy society a vet who treated a person at an accident site, disaster, etc. has a much greater chance of a lawsuit than a human doctor or nurse in the same situation. So yes, a vet surely could do basic treatment of a human, but does not have any sort of advanced training in the specialties, but human doctors do not either.