This past Friday night I got maybe an hour of sleep. My dog Tia was crying to go out at hour and a half intervals all night. I let her out and I followed her and she attempted to have a bowel movement numerous times without results.
We had a schedule appointment with the Vet the next day, Saturday, He instructed us to take her off the bland diet she was on and put her back on to her regular food.
When we got her home she was panting heavy, I believe from the vet visit making her nervous. She did not want to eat. My wife and I decided to let her settle down and try feeding her later.
Tia finally ate some dog food, she seem normal the rest of the night. This morning she wasn't interested in dog food, but did take a dog treat. I let her out she did have a bowel movement but it was diarrhea. Needless to say the wife and I are very nervous about her condition, she seems to be acting okay.
We are not sure what to do.
The internet says her stomach Maybe sensitive and to feed her foods that are easy to digest.
Is another change of diet going to make her worse?
I did purchase a bag of low fat dog food that I wanted to gradually mix into her regular food. She has pancreatitis which may be the reason for the diarrhea I don't know.
I think we're going to have to call the vet again to get some advice.
They developed problems as they get older too, and it is hard to watch them be sick. I know you have most likely tried a lot of foods, but Purina makes a Lamb and Rice and Lamb and Oatmeal food in canned and dry food. It is for sensitive stomachs. I don't know if you feed her canned or dry but maybe the canned will be easier on her stomach. 
It is hard when they can't tell you where it hurts.
