See the Primary Lens Luxation DNA results we have gotten so far on our dogs.

Miniature Bull Terriers, like most other breeds, are susceptible to certain health problems.  Some can be fairly minor, such as seasonal allergies which cause skin irritation, and others can be quite serious and even deadly.  The most common serious health problems in Minibulls are an eye disorder called  Primary Lens Luxation (PLL), heart problems such as Aortic Stenosis, and kidney problems such as Hereditary Nephritis, Renal Displaysia, and Polycystic Kidney Disease.  They can also have behavioral problems such as Obsessive Compulsive Disorder, Sudden Onset Aggression, or Spinning.  Most of these problems carry some genetic component, so it is very important to get your Mini from a serious and dedicated breeder who tests their breeding stock for all possible health problems, and will only breed from dogs with the best temperments.  Of course, even with the most careful breeding, you are not guaranteed there will be no health problems in a dog, but your chances are much improved.  Good breeders are likely to grill you with questions before placing a puppy with you, and they will be very selective about placing puppies in appropriate homes.  They will also be happy to answer all of your questions about the breed and their dogs in particular, and will be happy to show you the health tests results of their dogs.  Even if you are looking for "just a pet", go to a breeder who shows their dogs and works hard to produce quality specimens of the breed.  I cannot emphasize enough the importance of going to a reputable breeder, in any breed, but especially for a Miniature Bull Terrier.  You may have to be patient and wait a while to get your puppy, but your chances of having a healthy and good-tempered companion will be so much greater.