It’s not the food (IMO). Unfortunately many dogs are given up due to environmental allergies.
There is no cure, but there is effective treatment.
For best results go to a veterinary dermatologist.
The intradermal skin testing takes about 45 minutes and the dog is sedated so he will be comfortable.
See former posts. /forums/topic/inflammatory-bowel-disease-what-dog-food/#post-111755
If going to a veterinary dermatologist is not an option, continue to work closely with your veterinarian, there are newer treatments available.
There is no cheap way out of this……
/forums/search/environmental+allergies/
