Slasher the Bull Terrier / Australian Cattle Dog (Red Heeler) mix breed dog
The Bull Heeler Terrier is not a purebred dog. It is a cross between the Bull Terrier and the Australian Cattle Dog, also called the Blue or Red Heeler also called the Australian Cattle Dog. 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.
(Note: the Blue Heeler is also called Australian Heeler, Hall's Heeler, Queensland Heeler, Australian Cattle Dog, Australian Cattledog and Australischer Treibhund.)