Personally, I think it's a case of better safe than sorry. You'll hear evidence for both sides of the story. However, until I hear some evidence that suggests feeding them outside of their tub/cage has a negative impact, I'd rather feed outside, even if just for my own peace of mind as a placebo. I'd welcome someone that could tell me about some negative side-effects though, 'cause I'm not sure it's a real great idea to be handling a BP that's digesting food, putting it back into the enclosure. Just my .02, as they say.