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It may take as long as 2 weeks for a kitten to be able to hear well. Their eyes usually open between 7 and 10 days, but sometimes it happens in as little as 2 days.

Yes. I enjoyed that moment when theyre born. I remember them hissing when I try to touch them even though their eyes are not yet open.

Cats have 30 vertebrae (humans have 33 vertebrae during early development; 26 after the sacral and coccygeal regions fuse)