Thunder is ALWAYS hungry! He was underweight by about 25 lbs when we took him in last July, but he's now at his right weight (145 lbs.) according to the vet. We have other dogs and there is always a bowl of dry nutromax (the one with glucosamine chondroitin for thier bones since they're all big)left out. They all snack out of it periodically during the day, so if he's really hungry there's always something available. But this does seem to happen only when he's got an empty stomach, like about twelve hours away from his last real "meal". I'll try splitting the dogs meals into 2 smaller portions at morning and night. Maybe that will do the trick. Thanks for the info. His spitting up isn't really a bother, since he lets us know and runs to the door to go outside, but I just wanted to make sure there wasn't some serious problem we or the vet was missing. Thanks again and good luck with Keagan!