Luisa doesn't give a flip for cuttlebone. I've never seen her touch it. I have a few very large pieces that I put her food on like a plate. She does bite into it when she's agressive with her food - which probably helps her beak stay trim- but its never occured to her to actually knaw on it. I think the little guys like it more than older rt's. But then again, I only have one so can't say for sure.