I've never tried BB but I do find it interesting that they say not to free feed your cats with it. I couldn't free feed my 8 cats even if I wanted to because some of them would eat all of the food so the others would never get anything. I do understand about slowly transitioning a cats food but I've run into the problem of my cats loving the new food so much that they only eat that and then leave their old food. For some odd reason my cats now refuse to eat Wellness Core dry so now I've switched again to Merrick's Before Grain Chicken dry. They all seem to really love it but in the beginning some of my cats did tend to have looser stools and they will also sometimes have some gas. Alani & Blaze are now also on this food because they weren't doing well on the Chicken Soup For The Cat Lovers Soul Light dry formula. They both have very sensitive stomachs so they'll always have some loose stools every now and then. I'm just glad that I can now buy only one kind of dry food that everyone loves to eat. I buy it at Pet Club and right now they're having a sale on it for only $17.99 a bag so I bought 3 bags. Normally it's $22.99 but Petco and some other pet stores sell it for an even higher price. They didn't like the Before Grain canned so I'm sticking with Wellness canned. Good luck with the new food transition.