Sassy's Allergy Test Results

So basically, My vash has terrible allergies.. his poor neck has no hair and he is constantly licking and biting himself. soo here is the recent events
1. cortisone
2. cortisone and then start benadryl (stop cortisone)
3. at the same time as above.. HIll's Z/d ultra allergen for 10 weeks..
we Will see what happens.. Although I am skeptical about hill's I will try it as an elimination diet.. ugh.. I got some advice already but any other advice would be great... raw food? It was good for him. but homemade with veggies.. lots of work ..I work full timeand I am working on a dissertation.. [:-] I was feeding him solid gold hypoallergenic with some raw meat mixed in.. he loved it.. I was also giving him 3V caps for the omega fatty acids. I hope sassy is doing well.