The Staffordshire bull terrier is a fairly healthy and physically strong breed, but the breed community quite reasonably recommends completing a set of certain health tests to ensure the health of the producers and their offspring. Unfortunately, even the best results from all the tests available in the world never guarantee you that the puppy will be 100% healthy: genetics is more complex, and hidden individual genetic predispositions can manifest in an older dog under the influence of environmental factors and home care. However, proper health testing significantly minimises these risks, so make sure to check if your puppy's parents have had all the recommended tests done.
Puppy buyers should know that even if their puppy has a pedigree, it does not guarantee that his parents have done all the recommended tests or some at least. For breeding Staffordshire bull terriers, for example, in Estonia, health tests are not mandatory at all, but a responsible breeder must know the health status of his dog. Nowadays these tests are quite accessible, do not cost too much, and are technically not difficult to complete. The official minimum required health tests may vary from country to country and are usually set by the local Kennel Club. For another example, in Finland it’s mandatory to do both eye screening and hip dysplasia test, starting from 2025 - elbow dysplasia test too. Source:
Finnish KC For a dog used in breeding, a good example of test set is: joint examinations (hip dysplasia, elbow dysplasia, and patellar luxation), eye examination (recent), DNA tests for breed-specific diseases L2HGA and HC or known status by the parents. In the case of the last two DNA tests, sometimes breeders do not redo them if they are confident about clear results of the dog’s parents. But still, it's considered a good form to re-test the offsprings a generation later to avoid the emergence of the condition.
Remember that Kennel Clubs and local laws do their job to support ethical breeding, but it’s the puppy buyers who create the demand. As long as the demand for cheaper puppies exists, and puppy buyers do not pay enough attention to parent’s health tests, there will always be someone out there with a corresponding offer.