How do you judge a cat's age? It is by length or weight or anything?

Answers:
It's hard to tell once they're adults, but you can sometimes tell by the quality of the fur, since older cats sometimes have more dry and brittle fur >

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Vets can tell by their teeth.

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smell it's breath and divide by 2

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The vet can gauge fairly well by looking at the teeth. Otherwise, there's really no way unless the cat is elderly. Sometimes you can tell the elderly cats pretty easily.

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check the teeth,and really young cats play more often than old cats.usually cats over16 or18 become thinner and their coat gets somehow more greasy,at least that happened to cats i know!

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Yes. Skinny cats are kittens; fat cats are old.. it is really quite simple.

Heh heh heh . vets look at their teeth to determine age.

meow? Purrrrrrrrrrrrrrrrrrrrrrrrrrrr.

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cut it in half, and count the rings?

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http://www.diabellalovescats.com/catfact.

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from the nail, fang, and voice. old cat certainly sctrach more often than kitten, and the fang is more sharp,and it voice FOR female is less than the male.

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a vet does it by checking their teeth

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The vet is the most accurate at telling you your pets age and the main way they can tell are by their teeth but there are also other indicators as well such as general health, fur etc.However you still may not get an accurate answer even with the vet. I had a darling cat who we rescued from a cat refuge. She had been dumped a couple of times before I got her, probably because she had bowel problems. A healthy special diet and lots of love and a bit of medication soon cleared this up and she lived a healthy happy life. However because of years of neglect she had bad teeth anyway and had to have several extracted when I had her leaving her just a couple of teeth in the end. Because of the condition of her teeth the vet found it very hard to estimate, see bad conditions can age the teeth anyway. In the end I got an estimate of betwen 3-6 and she died in 2003. I got her in 1997 so I guess she was anywhere between 8 and 12. Somehow I think she was probably around 10. She died of bowel cancer, which was no surprise given her problems years earlier. She was an absolute darling to the moment she died, never did a single naughty thing at all and was so affectionate. She coped with so many changes in her life and coped so well.I still miss her..she's buried in our backyard now where she use to love to lay in the sunshine (sob sob)..

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vets usually look at their teeth

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looking at a cat's whiskers is also helpful. whiskers on a younger tend to be more straight/rigid with no bends and they are not as dull