It is very common for cat owners to ask their veterinarians how old their cat is. Many cats are found or they come into our lives as adult cats, so many pet owners don't know their cat's age.
For kittens it is a bit easier to "guess" the approximate age. We know based on kitten dentition patterns when certain teeth come in (average ages) and when their adult teeth come in.
For example, take the canine teeth (the fangs that cats have in front). The adult version of those teeth come in at around five months of age.
For more tips on aging a kitten, go to: How Old is This Kitten?
What do we look at to age an adult cat? This article will tell you. Go to: How Old Is This Cat?
And remember – as cats age, they tend to have more medical issues. What symptoms should you be on the lookout for with a senior cat? Find out here. Go to: When Your Senior Cat Needs to See a Vet
I hope this helps.