I haven't fed my collection birds but have experienced the after effects of a friend's retic eating whole chickens. The poop was really watery and made me gag and I've cleaned up some nasty stuff before. With something as picky as a BP, I'd be worried they'd get hooked and only want birds so that may be an issue if you don't have a steady supply. As for nutrition, I don't know the specifics so I can't speak on that.
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