One way I have "assist" fed balls who refuse to take food is to curl your finger and thumb around their neck behind the head, and hold the pinky in their mouth with your other hand so the pinky's head is at the back of their throat. Then it is a waiting game, the only way the snake can move anywhere is to swallow the pinky and move forward. This can take time though, so do it near the TV and have the snake in your lap. Longest I have had to wait for the snake to swallow the meal was 25min. Expect them to put up a fight.