yup, that happened to me with Aldo!! This helped me pinpoint Aldo's problem is probably related to chicken since Beef frittata does not have it and surf n turf does.. I switched back to beef recipe and they have improved tremendously.. again.. I did order for my next bag the coast catch.. it does have chicken cartilage, but it is not as allergenic as the other chicken parts.. so we will see.. if he develops irritation again I know it is for sure, any chicken that causes it.. I also wanted to try a fish recipe on Katara and see how she does since she does have staining on her white side.. no irritation or balding but just brown marking... so... if she does better I might have to keep her on coastal catch and him on Beef frittata.. I have not noticed a difference on her being on surf n turn or beef frittata or earthborn so her issue cannot be the chicken.. might be another ingredient like peas or sweet potato... or maybe an environmental thing.. after coastal catch if I notice no difference on her I will switch her to earthborn that is less expensive per bag and she did great on (same tearing but better stools) and keep Aldo on the beef frittata.. I have also been thinking about trying NVI lamb limited ingredient for Aldo to give him another option to change every 6 months or so (like my friend @BruceP is doing with HRH) we wouldn't want our guys to get too bored on their food!!