I have a 3/ 4 month old foster who has a plethora of parasites. We have him on a pretty substantial med and only 3 days in I can can tell his butt hole is red and irritated. I cant imagine what it will look like in 11 days (end of round 1 of treatment). Any advice on how to help it? He only poops once a day, so I'm not even sure why it's this irritated.