Did your vet say your babies might be allergic to chicken?.. I heard Canine Caviar's Holistic Venison is really good. But it's pricey.
Did they start itching just recently? My pups tend to get dry skin during winter b/c we have the heater on high. So they used to scratch more often. Once I figured that out, I started to spritz them everyday with emu oil spray. Seems to work... They also get seasonal allergies so if it seems bad, I'd give them benadryl.