The Colorado Bulldog is a very large breed. Males range in weight from 100-140lbs. Females ranging from 80-120lbs.  They were breed to combine the size and strength of the American Bulldog with the protectiveness and agility of the American Pitbull Terrier. The Colorado Bulldog has been bred for many years but received its name only 20 years ago. They are registered through ARF and CKC