what do you mean by "feed outside"? my BPs are very shy eaters, and will only eat in their cages (unlike my corns and boas).. and are you trying to feed f/t or live?
if the shed is still stuck theres a sticky on the husbandry forum that should help you out.. if theres little pieces stuck later you can put the snake in a damp pillow case (inside of its tank) for about 10 min. and they usually get the stuck skin off.. i've had to do that for my male when he had some skin stuck on his face.
I fed my corn snake outside and it ate, I tried with the BP before I heard they are shy eaters. And it shed this morning everything is fine.
And I'm trying f/t but someone told me to try live first.