Boerboels we feel are more of the healthier breeds within the Mastiff Lines. 
With that said they are still prone to several health issues.  

HIPS:
We use PennHIP to test all our breeding dogs Hips.

The PennHIP method is a novel way to assess, measure and interpret hip joint laxity. It consists of three separate radiographs: the distraction view, the compression view and the hip-extended view. The distraction view and compression view are used to obtain accurate and precise measurements of joint laxity and congruity, respectively. The hip-extended view, sometimes called the OFA view, is used to obtain supplementary information regarding the existence of osteoarthritis (OA) of the hip joint. The singular, subjectively scored, hip-extended radiograph is the conventional radiographic view used by all hip screening systems globally to evaluate the integrity of the canine hip joint. The PennHIP technique is more accurate than this current standard, and it has been shown to be a better predictor for the onset of OA.
(Click this link for more information on)
PennHIP

ELBOWS:
We use OFA to test all our breeding dogs Elbows.
Because our breed grows FAST, both Hips and Elbows are extremely important to take care of.
Having the proper diet "we use an ALS (All Life Stage) Kibble" ("low" Protein, Calcium and Phosphorus levels), appropriate amount of exercise and proper bedding, such as Primo Pads in their crates and Kuranda Beds are very important to have.
 
Also, we add supplements starting at 8 weeks (EasyGAIT).
I'm also very OCD about having nice tight Feet and straight Pasterns on my puppies/dogs. 
This simple method also helps prevent any sort of Knuckling while your puppy is growing.
1000mg of Ester-C along with a heavy scoop of WHOLE MILK Ricotta Cheese once a day will do wonders!
Proof is in the pudding and it WORKS!


HEART:
We have an Echocardiogram & Auscultation done on our breeding dogs.
We feel one of the most important health testings of all is the heart!
They need that ticker to keep living!

EYES:
Entropion ~ The eyelid curls inward.
Ectropion ~ The eyelid curls outward.

 
CMR1:
(Canine Multifocal Retinopathy 1)
CMR1 is an eye disorder that can cause retinal decay which may impact vision, but very rarely results in blindness. 

(This disease is autosomal recessive meaning that two copies of the mutation are needed for disease signs to develop. A carrier dog with one copy of the CMR1 mutation can be safely bred with a clear dog with no copies of the CMR1 mutation).
 
HUU:
(Hyperuricosuria)
HUU is a condition that predisposes affected dogs to the formation of urinary stones, such as kidney or bladder stones.
(This disease is autosomal recessive meaning that two copies of the mutation are needed for disease signs to occur. A carrier dog with one copy of the HUU mutation can be safely bred with a clear dog with no copies of the HUU mutation).

DNA:
We use Optimal Selection to DNA test all our breeding dogs.
OS currently tests for 214 Genetic Health Predispositions, along with 45 Genetic Traits.