Allergies or behavior?
My dog has been to 2 dermatologists. He also had an alley blood panel done by the regular vet.
Since he was about 1.5-2, he's had, what I believed to be severe allergic itching. He's 5 and he is constantly scratching and biting his paws. The allergy skin test did not show any allergies. The blood test showed an allergy to dist mites, dairy, and a minor chicken allergy. He was apoquel and it did help but it had to be stopped, due to a medical issue.
However, when he's in the car, he doesn't scratch or bite his paws. As severe as the itching seems to be in the house, it doesn't seem likely that he'd be so distracted in the car, that he could ignore it.
Does this seem to be behavioral? If so, why did apoquel help?