Under One Week: Eyes are shut, ears are flat to the head, and skin looks pinkish. Part of the umbilical cord may still be attached.
1 week to 10 days: Eyes are beginning to open, ears are still flat. A kitten at this age is smaller than your hand.
3 weeks: Eyes are fully open, ears are erect, and teeth are visible. Kittens at this age are just starting to walk and they will appear wobbly.
4-5 weeks: Eyes have changed from blue to another color and/or kittens are beginning to pounce and leap. Kittens at this age will not need its mother milk anymore. They can begin to eat regular cat food.
8 weeks: Kittens at this age will weigh approximately two pounds. This will make them of age and weight to be neutered/spayed and to be adopted into a home as long as they are socialized and friendly.