We are on our 2nd bag, and the 1st bag was great, my Am Bulldog loved it, his allergies cleared up, his stools were dark and firm as they should on this type of food, his anal gland issues resolved....
Other issues that may cause lumps or bumps on your pet include sebaceous cysts that are essentially just clogged oil glands which will resolve on their own.
These products tend to be shelved right near the probiotics (and are sometimes bundled together with them in the same products), along with supplements that claim they'll resolve anal glandissues and prevent scooting.