We try and use parts of our animals. The Rabbit feet and hides get used and the carcass gets ground up in a meat paste. The goats horns and large leg bones usually get sold to knife and craft people. They can make sinew from the goats along with the hides can be pretty cool also. The hogs are the same using the skull and large bones for people that make crafts to sell. You can actually make a lot of money on an animal if you can piece it out and market all the pieces. Hog skin and parts like the trachea are so similar to humans that most medical schools use them but marketing these items and finding the right buyers is the hard part. If you have a University or zoo close by that has falconry will buy rabbit heads for treats for the birds of prey.