| http://www.w3.org/ns/prov#value | - In an effort to combat early-onset mitral-valve disease as well as syrinomyelia in cavaliers, the breeding guidelines ask that no cavalier is bred before they are 2.5yrs old and only then if both parents are a minimum of five years old, free of a heart murmur and, ideally, SM-free too (or at least only low-grade).
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