If a female cat has something that looks like balls, the owner may have misjudged it. If you have no experience, you can take the cat to a pet hospital and let professionals check the gender of the cat. Generally, you only need to look at the distance between the two holes under the cat’s tail to tell the difference. The longer ones are male cats, which are about 2 centimeters, while female cats are relatively shorter, less than 1 centimeter.