i chose not to feed any of my snakes while there in there shed process as when i first started out with corns, i fed them while they were in shed and both of them regured. so since then i chose not to.
I think it can all depend on the individual snake! Some will take, and some not. I do tend to wait till the shed is finished before i offer however, as i too have had them regurge if they take while in blue!!
Lots of Milks!! Few Royals, corns, Rosie Boas and Childrens Pythons. One Bci, and one Irian Jaya Carpet!