The UK Cavalier Club has published a "prioritised list of health concerns within the breed" at
Here is the list:
"The CKCS Club Committee (and all the Regional Clubs) were asked to input to the KC their prioritised list of health concerns within the breed. The CKCS Club prioritised the list in the following order:
[2.] Neurological Conditions
[3.] Ocular Conditions
[5.] Auditory Conditions"
I fully understand items 1, 2, 3, and 5. I don't quite grasp the high ranking of cancer.
MVD stands alone on this list, rather than being classified as a "Heart Condition". So, that would exclude other possible heart or circulatory disorders.
Neurological Conditions should include Chiari-like malformation (CM) and syringomyelia due to CM (CM/SM), as well as Episodic Falling Syndrome, Fly Catchers Disorder, and epilepsy.
Ocular Conditions could include hereditary cataracts, corneal dystrophy, distichiasis, dry eye syndrome, entropion, microphthalmia, progressive retinal degeneration, and retinal dysplasia.
Auditory Conditions would include congenital deafness, progressive hearing loss due to degeneration of the hearing nerve, and Primary Secretory Otitis Media (PSOM).
But cancer? How widespread is it in the breed, and what types are most common? In 40 years of owning Cavaliers, we had only one with cancer.