Grains are a common inflammatory and some bullies are sensitive even applied
on skin so I'd nix the OATMEAL shampoo. Children's medications can contain
aspartamine & other artificial sweetners TOXIC to animals so get regular adult
meds. If on antibiotics he needs a daily dollop of plain greek yogurt added to
kibble to repopulate his good gut bacteria and strengthen his immune system with
probiotics which, in time, will help w/allergies. Cheap white vinegar can be used
as a final LEAVE IN rinse (just blot dry afterwards) to help with his skin and aid with
controlling itching, also will deodorize longer. Mix 2 cups vinegar, fill plastic pitcher or
large bowl with water added and avoiding head slowly run thru coat. Keeping a Tshirt
will help protect skin. Change from Zyrtex & Benedry to others suggested here.
Try Tea Tree Oil diluted w/Coconut Oil on rash. Try no fish or salmon like buffalo
or venison...Good luck & GOD bless!