 Aside from the culling issues, the programme pointed out that selectively bred dogs were in poorer health than mongrels 

Deliberate inbreeding, including mother-to-son, father-to-daughter and brother-to-sister matings was said to result in serious genetic disease being perpetuated in many breeds.A 2006 report by Companion Animal Welfare Council called for major changes, stating that "inbreeding needs to be controlled" and that "animals with genetic defects should be barred from breed shows.