Cats meowing at night in winter is usually caused by estrus, which is a normal phenomenon and there is no need to worry. Cats may also become irritable and urinate randomly during estrus. These behaviors are all to attract the opposite type. If the owner does not want the cat to go into heat, he can have the cat sterilized, which will effectively alleviate these symptoms. If he does not want to have the cat sterilized, he can choose to take the cat for breeding.