pet allergies

Question
I have a border terrier. She is about 8yrs old now. She showed signs of allergies at one point when we lived in Colorado but that was short lived.  Then 4 yrs ago we moved to Palm Springs California and she has been miserable.  She licks herself 24/7. I've tried changing her diet, baths, flea collars, numerous trips to the vet with blood tests and no results. Allergy shots only give her a 7-10 rest. She ends up raw. She just licks her paws and whines. She scooches across the carpet on her tummy. And she is huge. she should only weigh about 14lbs and she's 22-26lbs. They thought at one point she had cushings disease. I can't afford to just keep getting blood tests and allergy shots. She seems to be worse after the allergy shot wears off. She starts to sneeze for a while after. I now have her on raw foods, no commercial. The suppossed allergen free dog foods didnt make a difference either. Can you help.

Answer
Ask your vet to give your dog a cortisone shot of dexamethasone and to dispense follow up dexamethasone tablets to keep the cortisone in the system longer.  That will prevent the rebound you are seeing after the shot wears off. The tablets are relatively inexpensive.