I'm a big fan of yearly bloodwork. Both Rocky and Baxter get bloodwork yearly (my vet refers to it as a "Wellness Test") and have since we first got them. It detected Rocky's very minor liver disease early and we were able to start his supplements before it progressed into something more serious.
All our vet does is just draw a little more blood when we take our guys in for their heartworm tests.
All our vet does is just draw a little more blood when we take our guys in for their heartworm tests.