Categories: kittens

What should kittens weigh at birth?

What should kittens weight at birth?

A healthy kitten weighs about 3-4 ounces at birth. This is 100-125 grams. They should double their birth weight within 2 weeks. This is an average. Some modern cat breeds such as the Maine Coon and Savannah cat (F1s and F2s) will weigh more as the former is the largest domestic cat breed and the latter is the largest domestic cat but a wildcat hybrid.

If the birth weight of a kitten is 25% less than the weight of littermates they are unlikely to survive unless placed in an incubator to be raised by hand.

Further, kittens with a birth weight of 90 grams (3 ounces) or less are more likely to die early. At five weeks their weight should be about one pound (454 grams) and at ten weeks of age, 2 pounds (907 grams).

Consistent weight gain is a good indicator of health. Conversely a failure to gain weight is concerning. Healthy kittens gain weight at about 7-10 grams daily.

My thanks to the vets and authors of the Cat Owner’s Home Veterinary Handbook at page 457 and 459 of the 3rd edition.


When do kittens’ eyes change colour?

There is physics behind the answer to the question, which may displease some readers and I'll understand why! By six ...
Read More

How do kittens play together?

This is called "social play". It is the way kittens interact with each other. It is different to how children ...
Read More

The sensitive periods for domestic cats to become socialised to other cats

All the discussions we have about domestic cat socialisation concerns socialisation to humans. Little is known about the important time ...
Read More

When do kittens open their eyes?

People ask: "when do kittens open their eyes?". The answer is that most kittens open their eyes sometime during their ...
Read More

When Do Most Cats Start to Meow?

Each cat learns to meow at different stages in their lives dependent on the circumstance and the individual cat but ...
Read More

Kitten Senses and Milestones Chart

This is a chart showing milestones in a kitten's development before and after birth over the first weeks. It is ...
Read More

Why are kittens’ eyes blue?

The answer to the question in the title is found in genetics, cat anatomy, kitten development and physics. When kittens ...
Read More
Please comment here using either Facebook or WordPress (when available).
Michael Broad

Hi, I'm a 71-year-old retired solicitor (attorney in the US). Before qualifying I worked in many jobs including professional photography. I have a girlfriend, Michelle. I love nature, cats and all animals. I am concerned about their welfare.

Recent Posts

Are American Curl cats healthy?

Yes, American Curl cats are healthy because cats of this breed don't inherit genetic illnesses…

11 mins ago

Bidens will be bringing a cat to the White House (plus Major and Champ)

NEWS AND COMMENT: Pres-elect Joe Biden and his wife Dr Biden won't just be bringing…

1 hour ago

Why are Maine Coons so big?

Maine Coons are big because (1) people want them to be big and (2) the…

10 hours ago

Why are Maine Coon cats expensive?

I'm surprised the question has been asked because how do you know they're so expensive?…

12 hours ago

Do cats stay in heat after they get pregnant?

No, cats do not stay in heat after they get pregnant. The more technical word…

1 day ago

Tiger King, Joe Exotic, could be pardoned by outgoing President Trump

NEWS AND VIEWS (COMMENTS): Joe Exotic is back in the news again. You can't keep…

1 day ago