dlcockrum:
I congratulate you on your dog's health and am sad to inform you that Cavalier Spaniels are among the most unhealthy of canine breeds. They are known for their heart, throat, and, especially, neck problems (Syringomyelia). Many of these were caused by the inbreeding necessary to recreate the breed in the early 20th century.
If you have 10 healthy Cavs you are among the most fortunate of owners and can enjoy all the plusses with no distractions. I have 3 boys that are mostly healthy and they are a delight.