Cats (females) become sexually mature when they reach a body weight of 2 kg. That is, a cat that weighs 2 + kg, regardless of its age, is considered sexually mature. The cat's heat depends on the length of the day, the more light, the faster the cat comes to "hunt". The cat's hunting period is from spring to fall, when there is the most daylight. Cats that live indoors have daylight at all times, since there is electric lighting. Thus, cats that live with people who have more than 14 hours of daylight a day - can come to "hunt" all year round, regardless of the time of year.
NB! There are two terms: spaying and castration. Sterilization involves manipulation to prevent fertilization, such as ligation of the seminal cords in males or ligation of the fallopian tubes in females. In castration, the internal sexual organs are removed (testes in males, ovaries +/- uterus in females).
These 2 terms are very often confused and misused. Most often, pet owners use the term "castration" for males and "spaying" for females.
We perform castration (i.e. removal of internal sexual organs of both male and female).
We also perform early castration (spaying) - from 2 months of age.
Answer: The operation can be performed when the cat weighs 2 kg (or more).