Do you mean "diseases" in the literal sense? There are some I am sure but I can't really think of any at the moment, but there are a bunch of things that would fall under other conditions, most parasites external & internal. I wonder about some bacteria but I don't know. My vets insisted that Clostridium was species specific, but I proved them wrong, of course my gang loves to prove the Docs wrong
Ringworm as mentioned is another.