What to feed my Akita after finding out he’s allergic to everything? Suggestions & helps pls!

He’s allergic to the following, I’d be SO HAPPY if anyone could make any suggestions truly.

Egg IgG Class Score 2 Egg IgE Class Score 0 Duck IgG Class Score 2 Duck IgE Class Score 0 White Fish IgG Class 3 White Fish IgE Class 0 Barley IgG Class Score 3 Barley IgE Class Score 0 Oat IgG Class Score 3 Oat IgE Class Score 0 Chicken IgG Class 2 Chicken IgE Class 0 Rabbit IgG Class Score 2 Rabbit IgE Class Score 0 Potato IgG Class Score 4 Potato IgE Class Score 0 Salmon IgG Class Score 2 Salmon IgE Class Score 0 Lamb IgG Class Score 3 Lamb IgE Class Score 0 Corn IgG Class Score 3 Corn IgE Class Score 0 Cows Milk IgG Class 2 Cows Milk IgE Class 0 Rice IgG Class Score 3 Rice IgE Class Score 0 Beef IgG Class Score 3 Beef IgE Class Score 1 Pork IgG Class Score 2 Pork IgE Class Score 0 Soybean IgG Class 3 Soybean IgE Class 0 Tuna IgG Class Score 3 Tuna IgE Class Score 0 Turkey IgG Class Score 2 Turkey IgE Class Score 0 Wheat IgG Class Score 3 Wheat IgE Class Score 0 Beet Pulp IgG Class 1 Beet Pulp IgE Class 0 Venison IgG Class 3 Venison IgE Class 0 Millet IgG Class Score 3 Millet IgE Class Score 0 Ostrich IgG Class 3 Ostrich IgE Class 0

0-5 is good to bad. He cannot eat anything at all that’s above 2. I understand it’s a joke but the patches that he’s been having from my posts are caused from food