Dog feet are very high in glucosamine and is very good for dog jointsROFL
Blood-- chickens usually do that clean up for me as they tryto participate even though its not their time.
I'm not a fan of feeding bones to dogs. Canned bones are supposed to be softer but I have not done this. My chickens are not strong enough to eat the feet,but I have read of others that do feed the feet to the dogs. Necks-- the chickens pick a carcass clean!!
You can spread out the fare by freezing much of it and portion it out. Myfreezers are for my own use, not retail sales.
THe blood pudings are old country cooking when everything but the squeal is used. Try scottish recipes. If I had grown up eating it, I would love eating it BUT I would only try blood pudding now on a dare. lol Same applies to chocolate covered ants!!

I hear they are good for stock, but they are so good for teeth and bones, and the dogs love them - so the dogs get them. I like to spoil my poochers. I have 3 of them ;P
The necks: at least 45 minutes of fun for my miniature poodles. Henry can eat one in less than five minutes.
The chickens do polish off carcasses that we do not use for stock.