My Pepper has had a sour crop for about three weeks now. We took her to the vet last week, he cleared her crop and did an xray and found no obstruction. He prescribed some probiotic and suggested we give her yogurt and mash. It is one week later and she her crop is still quite full in the morning. Hardly any poop, some runny white stuff. She drinks water but does not want to eat. She is so thin. Please help!