The rule of thumb for kittens is that the average young kitten should weigh 1 pound for each month of life. So a 3 month (12 week old) should weigh at least 3 pounds. But you can tell more about the kitty’s weight by looking carefully at him. If his shoulder bones, backbone, and hip bones are easily seen, he is underweight. You cannot go by the belly, because an emaciated animal often has a big belly. Unlike what others have recommended here, I recommend feeding a small kitten 4 meals of canned kitten food per day and leaving out some dry kitten food for overnight or anytime you are not going to be around for over 3 hours

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.

Kittens grow into adulthood — fast. That’s why it’s important to gain an understanding of how they mature and what their nutritional needs are early on. Read below to learn about how kittens mature into cats.

What Does My Kitten Growth Chart Mean?

Weight can be the number one indicator of problems in many cats, but where kittens are concerned, this is especially true. Kittens growvery rapidly, because in the wild, they would be expected to be weaned and fending for themselves by the time they are 12-16 weeks old. A kitten that is not growing is usually sick or may not be getting enough nutrition.

Can You Tell How Big A Kitten Will Get?

Unlike dogs that can vary in size from Chihuahuas to Great Danes, cats don’t have huge variations in size between breeds. Still, though, there is some variation. Some cats can be more than twice as big as others, depending on their genetics and other factors. An average adult cat weighs 10 pounds, but some petite cats can weigh closer to 5 or 6 pounds and other equally as healthy cats can tip the scales at over 25 pounds.  Get to know what’s normal for your unique pet. That way you’ll notice if your cat is gaining or losing weight.

How Fast Does A Kitten Grow?

Growing kittens under 6 months of age will weigh approximately their age in months. So, a 2-month-old kitten should weigh approximately 2 pounds, a 3-month-old kitten should average 3 pounds, and so on. Don’t worry if your young kitten doesn’t follow this weight formula exactly, though. Each pet is unique. As long as your kitty has a clean bill of health from your veterinarian, your pet is on the right track. 

A kitten’s weight at 6 months of age and older is more variable between individual cats, since they are starting to get closer to their adult size and may grow at different rates.

What If My Kitten Is Losing Weight?

It’s always best to err on the side of caution and talk to your vet — especially if an underweight kitten also has symptoms of illness. Kittens are still growing, meaning their immune systems are not fully developed and they’re much more susceptible than adults to parasites, viruses, and other infections (this is why it’s important to vaccinate your cat). Plus, they can become ill very quickly so it’s best to check with your vet ASAP.

Can Kittens Be Overweight?

Yes, this is possible. Common causes include overfeeding, overindulgence in treats or table scraps, a sedentary lifestyle, or changes in weight after a spay or neuter surgery. Being overweight as a youngster often translates to obesity in adulthood, and all of the associated health risks like arthritis, diabetes, or heart and lung conditions.

If you feel your kitten may be overweight, don’t restrict their food right away. Instead, talk to your vet about the best weight management plan for your fur baby, and schedule frequent weight check-ins.

When To Weigh A 3-Month-Old Kitten?

We suggest that you should weigh your kitten in the following circumstances:

  • If it’s having a major growth spurt and goes through a significant change in size or weight
  • If you think something is wrong with your kitten.

Weighing your kitten every week will really help you track their progress. This will help you to catch any problems at an early stage before they turn serious.

How To Weigh A 3-Month-Old Kitten?

Your 3-month old kitten should be weighed on a flat surface. If you have a baby, you can use his scale to weigh your kitten. You can use a small digital scale to weigh your kittens such as a kitchen scale. In both cases, remember to disinfect the scale before and after use!

To know if a kitten is growing well, you must first weigh it and find out if its weight is normal (see below the average weight of a 3 month old kitten) and increasing steadily. For good raising a 3 month old kitten, it will be necessary to weigh it regularly to follow the evolution of its weight and especially to check that it does not lose any.

How Often Should A 3 Month Old Kitten Be Weighed?

Before the age of 3 months, the weight of a kitten must be followed very closely (see how to take care of a 2 month old kitten?). The frequency of weighings between 1 and 3 months must be once a week. By noting the results to make a growth curve, we can check that the kitten is gaining weight regularly and especially that it does not lose any!

From the age of 3 months, the weighing frequency changes to Once every two weeks, which will be enough to properly control the evolution of the kitten’s weight.

How Much Should A 3-Month-Old Kitten Weigh?

Your 3-month-old kitten will weigh around 900 g – 1300 g. This is the age where most kittens wean from breastfeeding so you’ll no longer be feeding them every couple of hours.

Factors To Consider For Weight

The weight of a kitten is variable according to its breed, its age, its genes … Knowing the “normal weight” or making the curve of the “ideal weight” of a kitten according to its growth is very complicated because too many factors come into play to do these calculations.

The bigger and bigger a kitten will be as an adult (according to his race) and the longer it will grow. For example a Siberian cat where males can weigh up to 10 kg will take almost 5 years to complete their growth.

Another example, the growth of the male kitten is little longer than that of a female kitten. In fact, up to the age of 3 months, male and female kittens have almost the same weight, then from 3 months, male kittens become heavier than female kittens.

And there is also the genetic factor which affects the weight of a kitten. In fact, half of a kitten’s chromosomes come from its mother and the other half from its father. If one of its parents is very tall or very large, the kitten’s growth may be different from that of a kitten whose 2 parents are very small and thin.

What Is The Weight Of A Kitten At Birth?

The average weight of a kitten at birth is between 90 to 110 grams. Healthy, well-fed kittens gain 70-100 grams per week for 2 months.

What Is The Weight Of A 3 Month Old Kitten?

Depending on its breed and gender, the approximate average weight of a 3 month old kitten is more or less between 1,2 kg and 1,7 kg.

At What Age Does A Kitten Become An Adult?

Again, it depends on the breed of the kitten. The majority of kittens reach their adult size around 9 months. Therefore, a 1 year old cat is considered to be an adult cat whose weight must remain stable.

What Is The Weight Of An Adult Cat?

The weight of an adult cat is variable according to its breed. In addition, it differs according to the sex, age, physical activity and whether or not the cat is sterilized. To find out if your cat’s weight is normal, it will be best to ask your veterinarian. See my article: Weight of a cat according to its age

However, here is a small grid which is only an estimate of the average and approximate weight of an adult and healthy cat:

  • Average weight of a male cat: between 4 and 5 kg
  • Average weight of a neutered male cat: between 4,5 and 5,5 kg
  • Average weight of an adult cat: between 3 and 4 kg

When Do Kittens Stop Growing?

There isn’t really any hard and fast scientific evidence to prove at what age do cats stop growing. Different feline breeds grow at different rates, and some breeds are quite petite at maturity. Others can be surprisingly robust in size and never seem to stop growing.

Most cat breeders agree that kittens stop growing somewhere between 8 and 16 months, depending upon the breed. That’s a pretty good rule of thumb for the vast majority of cats. However, it can be a bit more complicated than that. As we all know, cats are naturally contrary creatures and nothing is that simple!

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