Well, mastitis is very common in an animal that consistently lies on dirt to rest. And when you think about it, pus is nothing more than immune cells and their secretions fighting bacteria, but it’s diluted to the point what it’s negligible.

On the other hand, coprophagia is also inevitable and part of everyday life but nobody curls their upper lip at that! Lol

But yeah, studying microbiology changes people. *twitches*