1. Appearance observation: Maine Coon is a big cat, with a big body, generally silver or brown coat and obvious markings. Pay attention to observe whether its body proportion, head shape, eye color and other characteristics meet the standards of Maine Coon.
2. Check the pedigree certificate: purebred Maine Coons generally have pedigree certificates with detailed pedigree information, including parents' pedigree and registration information. Make sure that the certificate is issued by a trusted Caterpillar Association or registration authority.
3. Seek professional appraisal: You can consult professional cat exhibition judges or veterinarians, who are very experienced in judging whether a cat's pedigree is pure or not. They will judge by observing the cat's appearance, pedigree certificate and so on.
4.DNA detection: By extracting the DNA samples of cats and carrying out genetic analysis, the pedigree of cats can be accurately judged. This method is more accurate, but it needs to be tested in a professional laboratory.