Havapoo

Both come from both parents, and both are the ordinary small-dog orthopedic problems. The kneecap slips out of its groove in the first, giving a skipping step; in the second the head of the femur loses its blood supply and collapses, usually before a year old, causing progressive lameness. Neither has a DNA test. What you can ask for is a knee grading on both parents from a veterinarian who examined them, and the certificate rather than the assurance.

Two different problems from two different directions. The Poodle side carries progressive retinal atrophy, and PRA-prcd has a cheap DNA test that both parents should have - two carriers are what produce an affected puppy. The Havanese side brings hereditary cataracts and its own retinal disease, and for those no DNA test settles the matter: what exists is an annual eye certification by a veterinary ophthalmologist. Ask for both parents' certificates and check the dates.

Deafness appears in the Havanese, particularly in dogs carrying a lot of white, and can affect one ear or both. There is no DNA test. A BAER hearing test is the only reliable check, it is done on puppies and on breeding stock alike, and a breeder working with white-heavy lines should be able to say who has been tested. A one-sided deaf dog often lives an entirely normal life; knowing is still better than guessing.

An inherited skeletal condition producing abnormally short, sometimes bowed legs and the joint problems that follow. It occurs in the Havanese and is distinct from the breed's normal slightly-longer-than-tall build. No DNA test is available for the Havanese form, so it is a question for the breeder about what has appeared in the line.

Blood bypasses the liver instead of being filtered by it, which shows up as stunted growth, a poor appetite or neurological signs after meals in a young dog. Havanese carry some incidence of it. A bile acid blood test screens for it and is worth doing in the first year rather than waiting for symptoms. A true shunt usually needs surgery; the milder microvascular form is managed with diet.

Heart murmurs from a leaking mitral valve turn up in older Havanese, as they do in most small breeds. This is worth separating from what happens in a Cavapoo: the Cavalier's version starts young and is the leading cause of death in that breed, while the Havanese pattern is a senior-years problem managed with medication. Annual listening at a checkup catches it, and treatment started early adds good years.

Epilepsy means recurrent seizures with no other underlying cause, usually first appearing between one and five years old, managed with lifelong daily medication and excluded by insurers once it is on the record. Sebaceous adenitis is an immune condition that destroys the skin's oil glands, leaving dry scaly skin and patchy coat loss; it cannot be cured but oil baths and supplements manage it. Neither has a useful DNA test, so a breeder's honesty about the line is what you have.