Shadow update
Shadow's latest test results are back and everything points a problem with her intestines. The vet is certain that she has IBS, lymphoma or both. A more accurate diagnosis would involve anesthetic, biopsy, and lots of money. Given Shadow's age and weight surgery, while doable, is probably best avoided. For now, we're going to assume it's IBS and change her diet to see if her weight comes up. In a few weeks we will reevaluate and may put her on prednisone (which is used to treat both conditions).