I just did a Google search on "
industrial composting poultry grower" so if you click on this link you'll find those results.
In particular, a couple of articles from North Carolina might be helpful. There is a huge poultry industry in NC, so the state ag universities there have done research into this subject.
Composting Poultry Mortality Poultry Mortality Management There is a "yuck" factor when considering the number of birds that go into the compost and the speed at which it is produced, but it looks like this is a viable way of disposing of bird remains. You may want to read on the subject to find out of any of the medicinal or chemical applications used in poultry farming are going to affect the quality of the compost.
As Howard says, "you're in charge of this research." Let us know what you decide!