Catching things on sale is huge when feeding raw. I look for the marked down stuff as well. Basically any cut is good for them (vs. bag food) but I look for the fattier cuts as well. Cow cheek is cheap and is a good fatty chunk of meat. If there is a local meat market in your area hit them up. They usually have a scrap box by the cutting table. In is a catch all of meats, from ribeye ends (fat) to chicken 'inards' (as the old folks say). It gives variety but it also is really cheap in comparison to buying packaged cuts. S