Ok so one of my cats got sick after he was in a fight with a stray..cat or dog? He got a messed up scratch on his ear but we got that cleaned up and now its gone. A few weeks later he started sneezing ad had a runny nose and now all of my cats have it (3). So far this is all they've had BUT one of my cats had a bunch of spit bubbles earlier today and my brother freaked and thought it was rabies... what are some possibilities.?