7 years is not old for a yorkie. Many yorkie live to more than twice that age. Health problems can happen at any time though. I her thyroid turns out to be normal you should probably try to get her weight reduced as it can cause may problems as they age. The best thing is not to let them get so overweight to begin with. As far as the vet running all the tests, she's your dog and you have the final say in what tests are run. BTW my first yorkie lived to be 16 and I know several people who have had ones who lived seversl years longer than that |