what about an urinalysis? or xray to rule out an impaction or blockage in the GI tract….It is sad when our pals get older, we still worry about them as children....it is very curious that the blood work did not show anything. Maybe you can ask the Vet for some more tests, another Vet for a second opinion. Strange things could have happened to the blood work, mixed with someone else, a false positive for what ever reason,...I would not accept the diagnoses of "nothing wrong" if he was my boy! could he have possibly gotten into chocolate candy, any dangerous cleaning solution, or anything???? just some ideas..............go to petmd and click on the symptoms you describe. maybe something will jar your memory of something he got into....? PS: {I just went on the site and clicked the symptoms you described, here is what came up: (regular blood tests wont show cancer)}
intestinal Cancer (Adenocarcinoma) in Dogs
Adenocarcinoma is a malignant tumor originating in the glandular and epithelial tissue (the lining of the internal...
Symptom(s): Poor Appetite, Shaking, Weight Loss
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