I've fed my male ball pythons day old frozen/thawed chicks before. Aside from runny poop, it didn't have any negative effects on them. That said, I only fed it to them every other meal for a few months. I'm not sure how it would work as a sole source of nutrition.

You could try a cutlet chunk, but I think whole prey is better. In the wild when they eat birds they eat the whole thing, feathers, beaks, talons, and all.