In the second development al stage of kitten hood, when kittens open their eyes for the first time and their ear canals begin to let in sound, they are still developing these senses. Mixed litters (those with both short haired and long haired kittens) will actually develop at different rates because of this unique difference. 3. Be aware, a kitten's eyes are cloudy when they are first open. As a kitten's pupils don't dilate and contract readily, protect your kitten from bright lights. The umbilical cord stump falls off around day three. A kitten this age is smaller than your hand. At twelve weeks a kitten should receive its second set of vaccinations for feline enteritis and cat 'flu. A kitten at this age is equivalent to a child aged 3-5. Suddenly you’ll notice that instead of being flat to their head, their ears have popped up. Siamese kittens double their weight in week two. The most they can do is crawl a few inches at a time, starting their search of the world safely close to their mother’s side. If your kitten's eyes are open and its ears have popped up, it is probably 2-3 weeks old. Most kittens can leave their mother as early as eight weeks, however it is much healthier for them if they stay until about twelve weeks. When do a kitten's eyes open? Full Hearing. 8 to 12 oz weight. 4-5 weeks- Kittens have begun to pounce and leap. So if some of your kittens don't have their eyes open yet, but the others do, it may be because they are longhaired. Why was it once illegal to eat ice cream on cherry pie in Kansas. My kittens are 17-days-old and 3 out of the 5 have not yet opened their eyes. Dr. Ruben explains that kittens should fully hear and start responding to sounds, as well as sights, around 25 days after birth. Te eyes open naturally between 1 and 2 weeks after birth. Many kitten owners believe that how long till kittens open their eyes sets the standard for everything else, including how long until the kittens can be adopted. Vision and hearing is poor, and they can still be damaged by bright lights and loud noises. Kittens are weak creatures especially when they are a newborn baby that cannot even open their eyes yet. A kitten gradually starts to open its eyes in its second week. Its sense of smell also begins to develop and it will start purring, learning this from its mother. 3 weeks- Eyes are fully open, ears are erect, teeth are becoming visible, may just be begining to come through the gums Kittens this age are just starting to walk and will be very wobbly. Their vision will be poor and they will not be able to see at long distances.