I think I finally pinpointed the ingredient that has caused my chihuahua to itch severely at night. Well I think it is rosemary. Instinct Raw has this added to it, and she was itching, I discontinued it cause I thought it might be the yeast. She has been eating three varieties of Castor & Pollux ultra mix, indulgent mix, and when I fed her one particular flavor she started the scratching again. Well I realized that the common ingredient was the rosemary. Anyone else notice this with rosemary? No rosemary tonight, so far no itching!