"This is my dog Wrangler. The breeder called him a Foxybull. He is 1/2 English Bulldog and 1/2 Smooth Fox Terrier."
The Smooth Foxybull Terrier is not a purebred dog. It is a cross between the English Bulldog and the Smooth Fox Terrier. The best way to determine the temperament of a mixed breed is to look up all breeds in the cross and know you can get any combination of any of the characteristics found in either breed. Not all of these designer hybrid dogs being bred are 50% purebred to 50% purebred. It is very common for breeders to breed multi-generation crosses.
Wrangler the 1/2 English Bulldog and 1/2 Smooth Fox Terrier