I plan to have my cats, a raw-food counter. one of my cats has severe allergies (32 of them to be exact). I have done some extensive reading about the raw diet and he says to add sound power at each meal. There are many ingredients in this mixture, one of which is yeast. My cat is allergic to yeast so I can not count them in the mix. is there something that I use, has the same nutritional value? Or is it ok to just leave it in the recipe, without any sort of deficiency?