Assistance Dogs are either rescued from animal shelters or bred in selective breeding programs and raised by volunteers prior to their formal training. (assistancedogseurope.org)
In some breeds heart disease is passed from generation to generation and so selective breeding programs may be of some benefit. (pethealthnetwork.com)
Yes, we have health problems because of that, but we strive to overcome those problems via selective breeding programs and DNA testing. (dogingtonpost.com)