my kitten is 3 months old and is losing hair around his eyes and a small patch on his paw. i know this could be mange, and this type doesn’t affect most humans, but he also has green gunk in his eyes all the time. could it be from me smoking around him, or is it more serious than that? he didn’t start scratching until the fleas came (around this time of year fleas infest our yard and some rooms in the house). another question is i know cats can’t wear flea collars, something about causing siezures, so what can i do to protect him?