I purchase mine from the local indoor market, I get about 30 for £3.50, various sizes I must say, they are the ones that have been on the chiller counter the previous day, they are not allowed to sell for our use, but fine for the dogs. I also buy my chicken trim from there, that's bagged fresh that day, you can actually see that happening while you stand being served, most of that is fresh meat, no rubbishy bits at all.