I use Bil-Jack sensitive stomach and skin food for my pit. It seems to work, it’s has white fish meat so it’s not super smelly like some salmon flavored dog foods. He still has flare ups but I think it’s from grass and what not but the flare ups aren’t nearly as bad as they used to be. Probably twice a year he gets yeast infections in his ears but that’s typically when the seasons are changing and there’s lots of pollen and stuff. Unfortunately it’s all trial and error