Brought Misty to the Vet today for her Rabies shot, and they asked me if I wanted to do a heartworm test. I asked what the cost was and they told me $157. I declined the test because of the cost since my cat is an indoor cat, and I figured that her getting heartworms was probably not very common. Is this a typical cost for this test, and if this test is needed for a prescription for revolution, which is expensive in itself, I am thinking about switching to Advantage for flea control when my current Revolution prescription expires.