Does Swanatello need to eat, or did the whole transforming-into-a-magical-lake-protector thing negate that need? If he DOES need to eat, is his picky ass stuck just eating raw fish or whatever else he can find near the lake?? Do his brothers bring him snacks sometimes when they visit??? :(
Donnie may not feel hunger anymore, and seemingly doesn't need to eat, but he still can and enjoys doing so, so his family brings him snacks and treats often.
Mikey brought white and dark chocolate that day so that they could both have some, but in the end, he didn't feel like eating any.