I was thinking it could be a good idea to have the ability to kill or chase entire litters. It could come with either an SB or GB charge, but the lioness would come back into heat in a few days, similar to losing a litter from not building a nest. There could even be an imposed limit of how many times you can do it per lioness or rollover or what have you. I know usually only an incoming male would kill litters IRL, but it could make breeding a little more interesting.

Jgirl has suggested that the cooldown might be shortened to 9-10 days, as to make it less effective than cotton root bark, but have no effect on future pregnancies as far as mutation chances.

Additional suggestions are welcome.