I read, with some concern, of a lot of young shelties with kidney issues, liver issues and thyroid concerns. To be better at monitoring the health of our shelties I am wondering if yearly bloodwork is called for regardless of how active or "normal" our dogs seem to be. Normally in a young, seemingly healthy, dog I would not be doing bloodwork unless they are either symptomatic of something or are being anesthetized - my vet doesn't need any more of my funds! What are your thoughts on the increase in these health concerns and the need for annual bloodwork?