maybe check to see what he is putting his face in outside also. sarah was having an awful problem with hives and broken out belly and her face breaking out everytime it rained. im like geez she cant get like this with every rain. so i watched her outside. she was going pp and sticking her face in all the leaves that had gathered around the deck of the house. of course she is allergic to several molds per her test so i removed the leaves and she is all but cured of her problem. oh she gets the occasional hive here and there but not like before and her belly doesnt break out nor her face. so maybe a check when of the outside to for allergens. just a thought oh and i dont know what anti histamine the vet put him on but ive found that for sarah zyrtec works better than benadryl on these types of allergies. just throwing that out there for whoever maybe reading this.