Well, he woke up with the gurgles again and wouldn' eat breakfast. Hubby rushed him to the vet before it could stop and they did blood work and the vet got to hear the noises. I gave him a list of symptoms and non symptoms, like no diarrhea, but some vomiting, etc. They did the bloodwork and EVERYTHING came back perfect. Yay!!!

They said that all his levels were great and still don't really know what's going on. We will only feed dog food (very difficult as Chester's a VERY picky and spoiled doggie and has all kinds of food allergies) and see if it still happens. He's started eating grass again, though he had stopped for a while.
Who knows, with Chester it could be anything. Maybe it's just bad gas pains. I know sometimes he toots a lot.