I have a male jack russle of about 4 years of age, also I have a German Shepherd but he is fine and shows no illness, about 4 days ago I came down in the morning to feed them, but found my jack russle didnt want his food and just lay down, he usually comes into the kitchen with me. I let them both out side and my jack russle was sick, he has now been sick many times, sometimes It will be a orangey liquid with lumps in or just water, I found that if he drinks alot of water he will just sick it all back up within about 10 mins, so if have decided to let him have a small drink every 30 to 50 mins. The past few days he has been lay down and seems to keep burping evry now again, and I can hear noises from inside of him quite regally. When he does walk he is very slow and cant jump onto his favourite chair, also his tail is down and he doesnt look happy. Also there is nothing he could of eaten or drank that would cause him harm. Any ideas on what I should be doing to help my dog?