Since they are family dogs, it is recommended to not leave one alone for long periods at a time. The fourth color is known as Tricolor, which is black and white with tan markings on cheeks, inside ears,  on eyebrows, inside legs, and on underside of tail. The next most common causes are cancer (12.3%) and old age (12.2%). The condition can begin to emerge at an early age and statistically may be expected to be present in more than half of all Cavalier King Charles Spaniels by age 5. It is rare for a 10-year-old Cavalier not to have a heart murmur.
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