Any cheetah can take a skin graft from any other cheetah, no rejection

Cheetahs alive today are so genetically similar that they're nearly clones of each other — the result of a population bottleneck thousands of years ago that nearly wiped out the species. Skin grafts between unrelated cheetahs, which would normally trigger immune rejection, are routinely accepted.

— Stephen J. O'Brien et al., Genetic basis for species vulnerability in the cheetah — Science, 1985