Players have observed that dead parents don't count towards the 'inbreeding' check:
"I have often used it as a method of breeding, to kill the old parents when I had too many horses that had a parent in common. After the parents are dead, you can breed and get normal horses. Leave the parents alive and you get lots of bad traited animals." [http://forum.wurmonline.com/index.php?/topic/6246865441-split-off-from-animal-congestion-fix/page__st__100page__st__20#entry643716 Source]
== Caring ==