I have one that *inhales* her food. I have tried everything from hand-feeding a few pieces at a time to the special bowls. Nothing worked for her. She also did this with water, as mentioned by Gen, I use a rabbit waterer in her crate and this has slowed her down somewhat. She still will gulp when she goes to the bowl.
My fear is she is not digesting her food well. I have saw entire pieces of food pass in her poo because she does not chew. However, she is a big girl and growing so I guess I just have to deal.