"Feline cutaneous asthenia is a rare inheritable skin disease of cats characterised by abnormal elasticity, stretching, and improper healing of the skin. Pendulous wing-like folds of skin form on the cat's back, shoulders and haunches. Even stroking the cat can cause the skin to stretch and tear. A recessive autosomal (non-sex linked) form of feline cutaneous asthenia has been identified in Siamese cats and related breeds. In the homozygous state, it is apparently lethal. Feline cutaneous asthenia is similar to the Ehlers–Danlos syndrome of humans."

Welcome to the first potentially lethal mutation in the game! This mutation would allow lions to have a chance to age to become an adult naturally although they will not be able to hunt or patrol similarly to Clawless lions due to the damage to their skin.

Depending on the "mutation" of feline cutaneous asthenia (FCA for short), lions can have both or just one gene that causes FCA.

If they are heterozygous for FCA (meaning they only get one gene that causes it) they will live! If they are homozygous, they will not live for long. This is based off of the genetic mutation of FCA in real life for cats, which is essentially a feline form of Ehlers Danlos Syndrome.

These felines would have natural wing-like appendages on their shoulders and potentially looser skin than most lions.