I have 2 out of 4 with allergies as well. Both are brothers, it's just one is more severe than the other.
His vet is aware of the allergy. We have not done a blood test but pretty sure it is ragweed. Starts every year about August thru Oct-Nov. Benadryl and steroids helped but he gets really moody on steroids and gains weight. He chewed his feet and got infected, saw his vet every 2 weeks until cleared up. Remained on benadryl and steroids til fur grew back in then off steroids slowly. Then he got an eye infection (forgot the long medical term) that was caused by his allergies. So went on eye drops and steroids for that. Then slowly weaned off. I hate him being on steroids so much because he can be hard on their systems, so I was hoping to find alternatives to avoid steroids as much as possible.
His vet is aware of his allergies acting up again and he's back on benadryl and a shampoo for his feet once a week, plus we are watching his eyes. (Since he had the eye infection once he is prone to get it again) She's on stand by in case we have to treat with steroids along with his other things.
I noticed he chews at night after he goes to bed. I'm looking to get him some socks to wear in hopes that will help.
But was researching different alternatives to see what was out there and run by his vet.