When I had a Milk snake I would feed him during shed, he couldn't shed his skin off and I tried 2 months trying to get it off but nothing happened and the snake died.
Before other members that might be new to this hobby start panicking because of the above post, I will add that feeding during shed whether it is a milk, a king a BP or any other kind of snake will not prevent them from shedding properly nor will it lead to death.

This was purely a coincidence.