I was thinking I know it happens in many different species, and since it's viable maybe we could introduce it here as a new mute.

Cleft Palette

Of course this isn't lethal in humans & pets due to correction surgery and all.

Now hear me out that this could go a few different ways:

A. Lethal Deformity : The cub wouldn't last long, not being able to nurse properly and all. (dies at x number of months).

B. Adolescent Death : The cub makes it to adolescent however because of the lack of nutrition dies at a year old.

C. Doesn't Die: However the lion/lioness is severely sick and will pass on at a young adult age because of the lack of nutrition as it was developing and its inability to hunt/eat properly. (meaning they would have frail bodies, skinny legs and of course the cleft palette)

I'd love to hear helpful criticism on this and opinions.