I don't know what you can do. I know that if I don't cut things up for Oskar he still quite often just shoves the whole lot into his mouth... so if I cut a sandwhich into 4 squares he will shove almost a whole square in if I don't watch and tell him to take bites or hold it for him. With bread though it does tend to stick to the roof of his mouth and he's only just started to let me help him get that out. I think it may be something which just takes time for them to learn. In the meantime just keep cutting it up, a lot less stressful