Meat absolutely IS allowed in poultry feeds here in the US,
@saysfaa (at least, at the federal level) - as you and I both know, its very difficult to make a nutritionally complete feed without using some animal source - porcine blood meal, chicken by-product meal, fish meal, crab or shrimp meal, insect meals, even (properly processed) feather meals. The use of "meat scraps" has been banned by the FDA - but "meat scraps" is a far more generic, far less "certain" descriptor of contents.
Its probably more accurate to think of it not as the FDA banning "meat scraps", but rather more tightly defining what can and can not be included. Largely, I suspect, for reasons associated with transmission of food born illness.
I've not dug deeply into the Federal Register, but
this is a decent place to start in layman's terms, with links to similar resources.
This is the Harvard Law PDF it mentions
And this is the relevant Statute (the 2011 Food Modernization Act)
[Summary]
[Full Text]
And the
FDA's page on Animal Feed
Hope these help - I need to get to work on the farm today. back this evening.