Hi! Recently I've developed a fascination with mutations and have been exploring in ways to get them. But I got this idea while combing through mutation. Lethal mutations, as we all know, are mutations where the cub doesn't survive into adulthood. However, while going through some of them, they started looking less intense? So what I offer is that maybe there is a small, smaaaaaall chance that lethal mutations can actually survive into adulthood/adolescence. For example, conjoined cubs could make it into adulthood and there have been evidence of conjoined animals making it to adulthood. Of course, not without it's limits though.
-Dying at a much earlier age (anywhere between 6-10)
-No hunting
-Male lethal adults cannot be king
-Maybe even no breeding with them

Do you guys have any other ideas for this? Let me know below!