If you don’t rotate proteins in the food, he has been eating the same protein and other ingredients every day for a year, which is how allergies start, they become allergic to what they eat every day.
That’s why we recommended rotate proteins once in a while at the least.
Maybe he is now allergic to his food.
Carna 4 is also a oven baked kibble and it comes in goat and venison for proteins and it doesn’t use synthetic vitamins, cause it comes from whole food so no added vitamins are needed.
Has he been in lots of grass or pollen lately??
Good that you are giving omega 3.
I would see if continuing the paw soaks maybe twice a day if Possible, for a week, then see how it is.
I recommend you look into Carna 4 oven baked kibble goat and venison proteins, and Orijen kibble.
Then if it’s still not great, see if your vet will do a skin swab culture.
Good luck!
Keep us posted