As much as I wanted another American Bulldog, I felt the need to get something different. I didn't want to compare any dog to Mal, because she was just so perfect. After my attempt to rescue a greyhound, after their racing career was over, fell through three different times, I am glad my son and I adopted Cookie from a family whose kid had developed allergies. Border Collies are a wonderful breed. You're right to concentrate on getting a healthy dog, no matter the breed or mix.