Here is a quote from their website:

Our Havanese dogs are CERF’d annually for heritable cataracts meaning that their eyes are checked by a board certified veterinary ophthalmologist and registered with the Canine Eye Registry Foundation (CERF) at Purdue University. They are examined for patella luxation (sleeping of the kneecap) and certified normal by OFA (Orthopedic Foundation for Animals). Our Havanese dogs are also BAER tested with normal hearing in both ears. They had their cardio exams done with cardiologist and certified normal with OFA. We have their hips x-rayed at 2 years for hip and elbow dysplasia. We also have preliminary hips and elbow x-rays done for early knowledge of hip status. Our Havanese dogs also have bile acid test for liver disease as well as yearly complete wellness exam that includes Urinalisys and Blood Work (Superchemistry Panel – CHEM27, Complete Blood Count – CBC and thyroid-T4). We health screen our breeding Havanese dogs because everyone deserves a healthy puppy! We do all possible to ensure that you will get a healthy Havanese puppy that will be your companion for many years to come.

 

Source: nevenahavanese.com