My 8 yr old lab bitch has been vomiting this week. Yellow and bile-stained. DH took her to the vet today and he suspects pancreatitis, she's going in tomorrow for bloods and scans. Except...she's not overweight and never has been, has never had tit-bits and is fed dry, hypo-allergenic, good quality food. All I can find about pancreatitis suggests, overweight dogs with a high fat diet. I'm worried it might be more serious - any ideas?