Bailey has been having some stomach issues for awhile now and it is killing me to see her in any pain. It has been a month since the last episode. It usually starts some time in the middle of the night, early morning. It starts with shaking which lasts throughout the day and then the stomach gurgling starts, it sounds like her passing gas in her belly.She follows me around everywhere, can not seem to get comftable and will not eat. Usually she will eat something by 9 or 10 at night but sometimes its the next day. I have taken her to the vet numerous times, and the vet seems to think its gas. I had asked the vet about changing her food(wellness canned chicken and wellness small breed dry) as I thought maybe it was allergies but the vet says its not allergies as she does not itch and it is not happening constantly. I am at a loss as to what to do, maybe change her food or some tests to figure it out? Any advice would be appreciated.