It doesn't seem to matter what my b is fed, so I believe his allergies are environmental. It is worse from March to September, but it never really goes away unless we leave town (another huge clue). He gets itchy red spots that (if allowed) he will lick or scratch bloody, a red blotchy tummy, black knuckles on the tops of his toes, infected toenail beds and black between the pads of his feet. After a very in depth consultation with a vet about allergies, we manage with foot baths everytime we return from a walk or the dog park, and weekly baths (sometimes an Rx shampoo but usually a gentle shampoo). After a towel dry, he gets hydrogen peroxide squirted on his paws (and underneath if it's bad). Sometimes, put an inch of warm water with peroxide in a dish pab and let him soak in that while he eats his breakfast (he's used to eating while standing in the sink). If the nail beds get infected, I use Mal A Ket wipes (antibacterial and antifungal) and a makeup brush to massage the Rx shampoo or hydrogen peroxide into the nail beds. Lucky for me, my b does not like Bitter Apple, so I keep a tiny bottle nearby to apply a couple of drops to new spots before he breaks the skin. I also found an equine skin ointment that smells like camphor - it helps heal and discourages licking. I only use Benedryl as a last resort. Knock on wood, we've got it under control.
If anyone has any suggestions, I'm open.
My first basenji broke out in hives while we painted our kitchen.
My second basenji would get explosive diarrhea if he was exposed to a change in routine or a new situation (may not qualify as an allergy, but it was very serious).