Oh gosh! I will definitely be calling the vet for an appointment!
I've been checking them really well for any cuts or anything from the fighting, but didn't realize that being sick would cause them to fight. I guess dogs aren't so different from farm animals - you definitely have to separate sick stock animals until they're well.
I was just thinking it was a discipline issue, since they have none, unless you count cuddles and treats.
I hope my babies are okay!