I tried everything too (times 1 year). The only thing that produced positive results for my dog was going to a veterinary dermatologist, getting intradermal skin testing and starting allergen specific immunotherapy.
Respit is not the same thing, the expertise of the specialist that evaluates and determines the results of the skin testing is crucial.
There is no cheap way out of this. I have posted ad nauseam on this subject, all you have to do is use the search engine here: /forums/search/allergies/
There is no cure for allergies, they are complicated and they get worse with age. However, there is effective treatment.
Ps: Allergen specific immunotherapy is the most natural treatment for environmental allergies.
Stop looking for miracle cures, there are none. If your dog has raw bloody skin and scabs from pruritus, ear infections and such, the regular vet has no choice but to prescribe steroids and such to stop the suffering and risk of infection, temporarily.
Just my experience, hope it helps someone.
