My little Jeffrey, who came home last week (he turned 8 weeks on 2/24), has had diarrhea since we brought him home. On Monday the vet put him on a low residual Iams food to try and help, but so far it's not doing the trick. His poor little fanny is red and sore.... he's dragging his little butt to try and get relief but it's making it worse! Is it ok to use some kind of diaper rash cream or cortizone cream to give him some relief!?! It's been a long time since i've had such a young pup in the house, is dirhhea normal when they first get home!?