My Samson does TERRIBLE on chicken. Then proved to do terrible on the NVI Duck/Turkey formula which I assume has to do with the turkey because turkey is real similiar to chicken. I would try the frittata or surf and turf. Fromm is an awesome food but not all the formulas are good for all bullys. Like Sam did great on the surf and turf but the chicken one would, I'm sure, cause a terrible allergic reaction.