Shannon, first I have to commend you for all your rescue efforts. Thanks so much.
I had a very similar experience with my dog. Just got tired of the madness and pills that were really just bandaids anyway. Went ahead with blood tests for allergans, and started the shots. For him, the results have been fantastic, took about 3 months to see a significant change, but itching, hair loss, and overall comfort level has improved 100%. Initial treatment was every day but now its 1 shot every two months. Spent more on the bandaid methods overall then the one time testing.
GSD Bailey 13 yrs 7-2-2009