Akirchner is right, I have seen those dog bowls designed especially for fast eaters. Beyond that, you might try feeding in smaller portions, and even hand feeding. While the hand feeding may sound a bit silly, I've done it for years. For whatever reason, my dog just prefers it that way. Another thing to consider, do you have a second dog? Could your dog be gulping down food because he's worried that someone else will eat it?