Complex sentence: Part of the reason for its rarity is that there are just 2 or 3 kittens in a litter.most common coat colors are in red, to grey, to bobtail stripes.
Split into simpler sentences: Part of the reason for its rarity is that there are just 2 or 3 kittens in a litter. The most common coat colors are in red, to grey, to bobtail stripes.