Sometime after they are around 6 months old, but usually older, a Staffy puppy's head will “split”. This process is called a lot of things, from spreading to splitting to cracking. Despite the names, it has nothing to do with their skull or anything breaking.

How can you tell if a Staffy is purebred?

If you purchased your staffy from a breeder, the first thing you should do is check their pedigree papers. Reputable breeders will provide you these papers, co-signed by the Kennel Club, detailing your pup's lineage; these papers usually goes back at least five generations. A pedigree is simply your dog's family tree.

How do I know if my dog is a pitbull or Staffy?

A Head for Heights

One of the most noticeable differences between these two breeds is that pit bulls are taller and heavier than Staffordshire bull terriers. American Kennel Club breed standards state that Staffies should stand between 14 and 16 inches tall at the shoulder and weigh between 24 and 38 pounds.