While you figure out what she is allergic to, give her aveeno baths. Aveeno is fienly grounded outmeal used on humans for rashes, sunburn, eczema. Bath the dog with the water at stomach level, soaking them for 30-40 minutes. It really works!!! But it is only a temporary solution until you find what that poor dear is allergic too. The rash will go away and they will not itch anymore. I hope this helps. Let us know how he does.