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When Will My Maine Coon Be Fully Grown?

The Maine coon is the largest breed of domestic cat. As a result, they develop at a much slower rate than other breeds. They should therefore be treated as you would a kitten for a longer period of time.

Often a Maine coon will not reach physical maturity until the age of 4 or 5 years old. A young Maine coon may not begin to develop their mane until the age of 9 months. Not all Maine coons will develop lynx tips on their ears.

When fully grown a Maine coon can reach over 20lbs in weight. Male Maine coons will grow to be significantly larger than their female counterparts. To read more about Maine coon sizes with some growth chart examples please see my previous article, How big do Maine coon cats get?

When do Maine coon Kittens open their eyes?

Just like other breeds of domestic cat, a Maine coon kitten will only open its eyes 7-12 days after it is born. Do not try to open their eyes for them, this can cause damage which can impair their vision. Kittens are born with blue eyes which then change colour over the next 12 weeks as they grow.

When do Maine coons develop their ear tufts?

The classic ‘ear tufts’ on a Maine coon are properly known as lynx tips. These are small tufts of fur which protrude from the tip of the ears. Although lynx tips are mentioned in the breed standard, not every Maine coon will go on to develop them. Maine coons bred from European lines often have larger ear tufts than American-bred Maine coons. Those who do have them will usually be visible from the age of four weeks old.

At what age will my Maine coon develop their mane?

Development of the neck ruff can take time in a Maine coon. You’ll often see a kitten become more fluffy in the neck area around the age of 9-12 months. Sometimes it can take several years for a full mane to develop. A Maine coon can look quite different from the age of 1 year to the age of 2 years old.

Petra and Zavi age 14 weeks, getting nice and fluffy!

You may also find that the time of year affects the growth of the mane. Your Maine coon may start to develop the beginnings of a mane but a change of season can bring this to a halt. In the Spring/Summer Maine coons will shed their winter coats. Their mane can stop growing at this point and then resume again in the Autumn when the weather begins to turn colder again. Anecdotally some owners say that it takes until their second winter for a juvenile Maine coon to ‘mane-up’.

Maine coons develop at different rates so your best idea will come from the parents. If you are still in contact with the breeder of your kitten then you can ask them how long it took for the parents to develop their manes. This will give you a good idea of how your kitten might develop.

When do Maine coon kitten lose their baby teeth and when do they stop teething?

Maine coons are much like other breeds of domestic cat when it comes to their teeth. From the age of 4 months they will begin to lose their baby teeth to make room for adult teeth. Kittens will often swallow their baby teeth when they fall out. Do not worry about this as baby teeth are small enough to pass through their digestive system without causing them any problems.

A Maine coon’s adult teeth will finish coming through between the ages of 6 and 12 months. Also, there may be a period of time where they have 2 sets of some of their teeth. This is because the Maine coon jaw is so large that even a new adult tooth is not big enough to force out the baby tooth. Eventually these baby teeth will become loose and fall out of their own accord.

You can tell if your kitten is teething by some of their behaviours. If they are suddenly putting everything into their mouth and chewing on things that they normally wouldn’t then you can be fairly certain that they are using this to comfort themselves because of teething pain.

How long should a Maine coon eat food specifically for Kittens?

Maine coon Kittens have a lot of growing to do. They will therefore require kitten food for a longer period of time than other breeds of domestic cat. This is because food for Kittens contains the extra calories, fat and protein that Kittens require for healthy growth.

Maine coons require kitten food for at least the first year of their life. Royal canin have a specific Maine coon dried food formulation which comes in both adult and kitten varieties. This is what we feed our Kittens. Royal canin states that Maine coons should stay on their kitten formulation until the age of 15 months before changing over to the adult variety.

When do Maine coon cats go into heat?

Provided that they are growing adequately, a Maine coon kitten can reach puberty from the age of 4 months.

Female Maine coons should not be used for breeding when they are still Kittens themselves. You should wait until at least the age of 2 years old to breed from a female to ensue that they have developed adequately.

When to neuter your Maine coon is a bit of a contentious issue and so this is covered in great detail in this previous article, At What Age Should Your Maine coon be Neutered?


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