Last night I met a lady who raises Boerboels and she said that a lot of former owners of Rotties are coming to her researching her breed looking for a large protection dog. She said it was because so many of their Rotties died early from cancer. I have had three Rotties in my adult life and I couldn't get one to live past 11years old. Both Males I had died from stomach cancer. Is it because of breeding practice or something like Dalmatians and deafness (gene link)? Is breeding getting better at getting dogs to live longer and healthier?