Yep! You can use a crunchy worm and lion scrotum in the same breeding without risking them canceling each other out!
Though, noting that your king is a piebald, there is a chance that the piebald with override any mutation from a lion scrot as seen in the mutation roll order, just so you're aware!

Leopon OR Overgrown Fur OR Tigon† ➜ Patches/Piebald† ➜ GMO Cow/Lion Meat ➜ Cotton Root Bark ➜ Fertility/Natural Chance ➜ Lion Scrotum ➜ Primal ➜ Dorsal Fur† ➜ Tigon Boost* ➜ Mukombero ➜ Dorsal Fur Guarantee*

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They can, however, its then better to NOT use Buffalo Scrotum/Grain of paradise on the litter. The more cubs there are in the litter, the more is the chance mutation and clone will land on different cubs. Buffalo Scrotum does not increase chance of Crunchy Worm working, anyway, so it would only increase the chance the mutation and the clone would land on separate cubs.

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