The first couple of months of a kitten’s life is a whirlwind of developmental changes. Kittens open their eyes and ear canals, change eye colors, develop teeth, and gradually get weaned off from nursing to eating solid cat food.  A lot is happening from kitten’s birth to reaching adulthood and it is hard for owners, even for responsible and caring ones, to keep track of everything.

For a kitten growth chart, the rule of thumb is that a kitten will grow around 1 pound per month on average during the first six months. Therefore, a 3-month-old kitten size should be around 3 pounds. At this stage, kittens would start eating all solid food. It would also start bonding with its caregivers. At the age of 3 months, your kitten would have developed all of its baby teeth, which will soon start falling out. Kittens would also have developed their adult eye color.

A kitten weight chart or growth chart is an important tool to help gauge proper kitten development. With or without their mother cat, a kitten should grow steadily, at certain rates, and a variety of changes should occur within a certain time frame. The biggest indicator that a kitten is developing properly starts with weight gain, according to a kitten weight chart.

12 Week Old Kitten Size

Kittens grow a lot between 8 and 12 weeks. If your kitten has been in the family since he was 8 weeks old, he’ll have changed a lot. 

He’ll be significantly sturdier and more confident than he was when you bought him home to live with you a month ago.

Many pedigree kittens don’t go to their new homes until they are 12 weeks old. If this is your first kitten, or first kitten for a long time, even at 12 weeks, your kitten will still seem very small to begin with.

How Much Does A Newborn Kitten Weigh?

A newborn kitten weighs around 100g – the same as a bar of chocolate. With a body length of around 4 inches, it comfortably fits in the hand of an adult human.

Birth weight depends, amongst other things, on the breed of the parents and the size of the litter. Kittens from a large litter are generally smaller and lighter than kittens from a small litter. A Norwegian Forest cat already weighs more than a Siamese, for instance.

The mother’s living conditions during her pregnancy play a role. Stress, illness and poor nutrition can have a negative influence on kittens when they are born. On the other hand, a well-balanced and well-fed cat mother will probably give birth to heavier offspring

12 Week Old Kitten Weight

Every cat is different of course. But as a very broad guideline, the average cat will reach a weight of 10lbs or so before his first birthday.

To get to that point, your kitten will put on around a pound in weight each month from the age of 8 weeks when he probably weighed in at around 2lbs. So 12 week old kitten weight is usually about 3lb.

How Much Weight Should A Kitten Gain Each Week?

According to the University of Wisconsin School of Veterinary Medicine at Madison, your kitten should gain approximately ½ ounce (or 14 grams) per day for a total of four ounces (or 113 grams) each week. Ask the Cat Doctor has a handy kitten weight chart you can use to make sure your new fur baby stays on target with her weight gain. 

Ideal 12 Week Old Kitten Diet

We always recommend that you feed young cats on wet food. 

This is because some cats fed on dry food fail to keep themselves sufficiently hydrated and develop bladder problems as a result.

Male cats like Billy are especially susceptible to these problems, and wet food will help protect them and keep them healthy.

Your 12 week old cat still needs kitten food, don’t switch to adult cat food yet, it doesn’t have sufficient nutrients to fuel your cat’s rapid growth at this age.

We recommend that you buy the best food that you can afford and avoid the lower protein cat food that contain a lot of grain.

Although foods with less protein in are cheaper, you’ll need to feed more in order to get the same nutrients into your kitten. 

Is My Kitten Gaining Enough Weight?

You should be able to feel your kitten’s ribs if you press firmly along his sides but you certainly don’t want to be seeing those ribs through his fur.

And you shouldn’t be able to feel the knobbles along your kitten’s spine when you stroke him.

If you have any concerns about your kitten’s weight at this age, do have a chat with your veterinarian.

A healthy kitten will be full of energy and life, even if he doesn’t eat as much as you think he should. 

Failure to gain weight, listlessness, or feeling thin and bony, needs investigating.

How Often To Feed Kittens 12 Weeks Old

You can now drop down from four meals a day to three when your kitten is twelve weeks old. 

This means feeding bigger quantities at each mealtime to make sure that your kitten is still getting his daily allowance.

To avoid upset tummies, go easy on the portion sizes while your kitten adjusts to the new schedule.

At 12 weeks, Billy was eating the following meals

  • 8 am  – just over 2 and 1/2 ounces (75g)
  • 1pm  – 3 ounces (85g)
  • 6pm  – 1 and 3/4 ounces (50g)

What To Do If Your Kitten Isn’t Gaining Weight

If your kitten eats regularly but doesn’t gain weight, loses weight, or experiences digestive problems like vomiting or diarrhea, take her to the vet immediately. It’s possible your kitten has intestinal parasites, which feed off your fur baby and prevent her from absorbing enough nutrients from her food to gain weight. Catching health problems early tends to result in a more positive outcome, so it’s important to take your kitten to the vet at the first sign of a potential health issue. If your kitten is eating dry kibble, the cause of her weight loss may be a gluten allergy. Just like humans, some cats are gluten intolerant and may require a grain-free diet. A gluten allergy is rarer in cats than in humans, but it has been to happen.

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