Hello XXXXXX,
When you say losing hair, do you mean there are areas of skin where there is no longer any hair? Are there any scabs or crusty lesions?
Actually not. They lose hair year round and have an increase in turnover of hair twice a year (spring and fall). It can increase also if stressed. Stress can be due to any change for a cat. New people around, people no longer around, changes in hours people are home, new pets in the house, wind blowing east, wind blowing west, etc. The last 2 were a joke. For some cats any change can be a stress. I am afraid without seeing it it is hard to tell you much more. If there aren't bald areas and the cat isn't uncomfortable you may not need to get it checked. Otherwise I would have it checked by a vet.
Cat Veterinarian
I have been a veterinarian since 1989 and see many cats in my practice.