1️. First things first, determine the kitten’s age.Kittens grow day by day, developing new skills and changing their appearance:
Under 1 week - their eyes are shut, their ears are folded down, their claws are non-retractable, and they can’t yet walk. The umbilical cord might still be visible.
1-2 weeks - eyes start to open and focus (all kittens are born with blue eyes), ears begin to unfold, the claws are still non-retractable, kittens start to crawl, snuggle, and knead.
2-3 weeks - eyes and ears are fully open. Kittens can stand up and take first wobbly steps, they’ll react to noises.
3 weeks - baby teeth start appearing.
4 weeks - kittens’ pupils can focus, their canine teeth (fangs) are appearing. At this age kittens can already play with their mates!
5 weeks - kittens interact with humans and other kittens, and can groom themselves after a meal.
6-8 weeks - kitten’s baby blue eyes change color into a permanent one as their true pigment comes through.
If you appreciate some visual guide, here is a
great YouTube video and a
picture,
both by Kitten Lady.