This poor baby... something is terribly wrong, and I know how it is when you can't afford to find out more. It SUCKS. I think fasting is in order. I believe you said they did it before? I would do it again... but being a little dog, they are prone to hypoglycemia... so doggy will need it's nutrients from something. Gatorade will help, as stated. I really don't know what else to offer.