also high in protein. I also use it as a treat AND to get them to really stirring up my DL (deep litter).I used to add it to my FF but I know longer do. Its better used as a once in awhile treat than as a main part of their food. (I want to say its because its high in fat but I'm not sure thats the reason) I just know that someone said it was better as a once in awhile treat