Followup.... The one who licks his back and feet also is allergic to plastic, His face breaks out if we use plastic bowls, so we now only use stainless steel.
I agree with a lot of the above suggestions above about getting more oils in their diet. Our breeder recommended a slice of American cheese or a scoop of cottage cheese daily. We also might add a hard-boiled egg as a treat. And instead of cooking up rice, our vet recommended mixing up Gerber Rice cereal with hot water and mixing that with their food. I’ve found that giving cooked hamburger can give dogs the runs, so I would use it sparingly, if at all.
Oh, and check if they are getting peanut butter, because a lot of dogs love peanut butter, and they may not metabolize it well.
Have you tried using a Stridex pad on the chin pimples? Our vet recommended that and it seems to have worked, even though we still use plastic. I’m thinking of trying it on the bumps on her front legs as well.
Lastly, we have less problems with itching when we stick with the Bil-Jac food and treats, and/or the Canidae brand food.
Good luck and let us know!