I have a 5 year old Boston Terrier and he has been seen for throwing up. I am concerned because it has been three days now and no eating or drinking. They have given him water under the skin to prevent dehydration. I am aware what normal bile looks like from a dog and this is the color of moss...very dark green when he throws up. Can you be of any assistance?

Optional Information:
Age: 5; Male; Breed: Boston Terrier

Already Tried:
He is on Amoxicillian, has had Xray and full blood panel. Giving him water through a syringe at this time to keep him hydrated, using Pedilite.