Fresh fresh fresh is the way to go! Mine get whatever I can lay my hands on! Rabbit, hare, pigeon, corvids, mice, goose, ducks, squirell, pheasant, chicken- whatever I can get!
Whether it's fresh road kill or shot, or something I've managed to wangle out of the butcher for free, as long as it's fresh meat, they get fed it!
I have a few mates that do a lot of wildfowling. Often they'll just breast the birds, and give me the rest of the carcass. I also go beating on a couple of local shoots- anything thats badly shot damaged and of no value to the game dealer comes home with me for f