Because one of the most common posts on this sub is “is my kitten part Maine Coon?” I thought adding a post with identification information might be useful. While the "suspected" MCs posted here are adorable, this is a breed-specific sub and it is important to try to post MCs only. If anyone disagrees with what I’ve said here or would like to add something, let me know! I am an enthusiast, not an expert.
Additionally, keep in mind that all cats within any breed vary and most domestic cats from shelters are mixes of several/many breeds, just like dogs. The only real way to know that you have a MC/part MC is to buy from a breeder who can provide you with CFA registration paperwork (or similar pedigree documents from recognized organizations) or get genetic testing done.
With the growing popularity of the breed, many breeders require those purchasing kittens as pets to sign contracts ensuring they will spay/neuter the kittens and/or withhold the kitten's "papers" until they receive proof that the cat was fixed. A kitten purchased with breeding rights goes for upwards of $3000 - there just aren't many purebred MCs running the streets and having kittens. This isn't to say you won't find a full or half MC in a shelter, but it does make it unlikely. And beware, the people who try to sell cheap MCs are probably not selling MCs, just fluffy kitties.
I’ll start with some common myths I see:
The "M" on the forehead is a MC trait/identifies a MC - Not at all! An M marking on the forehead is a trait common to cats with tabby markings regardless of breed or coat length. Literally just Google image search "cat" and you'll see so many kitties with Ms that are definitely not MCs. Many MCs have tabby markings, so many MCs have an M, but solid colored MCs do not.
Long hair + large size = MC - Nope! Norwegian forest cats, Siberians, and ragdolls are a few of the other common/well recognized breeds with longer coats and larger body sizes. Also, some domestic cats just have long hair and are big boys. It happens.
Lynx tips and/or toe tufts mean a cat is a MC - Lynx tips and toe tufts can be present on long or medium haired cats of any breed. Moreover, some MCs have very small or absent lynx tips/toe tufts.
How to identify a MC:
Face shape - This is probably the best way to tell a MC from a Norwegian forest cat or Siberian, along with body shape. Norwegian forest cats have triangular faces with cute little noses that look kind of delicate. MCs have long but wedge shaped faces with rectangular mugs. This varies by cat and may be less prominent in kittens and females or obscured by the angle of the photo. Siberians have shorter faces and BIG, ROUND, irresistible eyes that are not often seen on MCs.
The face shape can be hard to distinguish, especially from one picture. Here are some good guides: https://thelittlecarnivore.com/en/article/what-are-the-differences-maine-coon-norwegian-forest-cat
https://www.mainecoonfancy.com/forums/topic/20885-comparison-chart-maine-coon-siberian-and-nfc/
Coloring - A wide range of colors are acceptable for MCs but if your large, fluffy kitty has Siamese points (lighter body with dark patches on the face, ears, tail, or feet) you've probably got more ragdoll than MC. Siamese points aren't generally accepted as a breed standard for MCs. Doesn't mean your cat isn't part MC, but it's definitely an indication of crossbreeding. Nearly every other color or coat pattern is possible for MCs.
Behavior - MCs are friendly, smart, and chatty. Not every MC chirps exclusively (or at all), and other breeds can also chirp, but this is one common vocal trait for the breed. They are generally considered soft-spoken cats. Some MCs like water, but it's not as common a trait as people think! Both of mine will play in their water dish or with the stream from the faucet but they absolutely hate baths. Doglike behavior is often present, but it’s also present in other breeds and not present in all MCs. It's difficult to identify a MC based on behavioral traits.
Other - Comically large paws and/or ears as a kitten. Beautiful, fluffy tails are basically a must. Long, sturdy bodies (longer and lither than Norwegian forest cats and Siberians). They often have "ruffs" around their necks but are less likely to develop a full-on mane than a Siberian or Norwegian forest cat.
ETA: don't know where the photo of the cat with raw meat came from, MC not confirmed :P
