Like the Tasmanian Devil (T. Devil for short (You should look at the link and see all the pictures(the last one is of the Loony Toons Tasmanian Devil))) that eats everything of a left over animal, including bones. And vultures, especially the Turkey vulture.
When you feed a chicken fruit and vegetable pulp, the chicken digests it, and then it comes out the back end, or they create chicken manure.
Then you collect the chicken manure, let it sit for a year where it's not in the rain, or where another animal can get to it.
Then after that one year, you use the chicken manure on you fruit and vegetable plants, then you get more fruits and veggies, and you can take the juice out of the fruit, then you have fruit pulp again, and then you give it to the chickens!
So that's why I think chickens are another one of Gods recyclers, plus, they're not scary, most of them are beautiful and you can make them your pet, like the Black Austrolop.