We have an almost 9 month old GSD pup who has been ill all weekend. He hasn't eaten anything except some peanut butter since Friday afternoon. He was diagnosed with Gastritis. Any other owners have any experience with this? His is pretty severe. He got some anti-nausea meds, but started throwing up today, so we took him to emergency vet and got a shot of the anti-nausea meds. Tomorrow we have been advised to take him to our normal vet and have them do a barium test. Anyone have any experience with any of this? Thanks ahead of time.