Average hours per day (American Time Use Survey) This term refers to the average number of hours spent in a 24-hour day (between 4 a.m. on the diary day and 4 a.m. on the interview day) doing a specified activity.
Usually a cats first season is somewhere between 4 and 10 months old with average age around six months. Siamese and Burmese cats are quite precocious and will often have their first season at 4 months of age.
In cat colonies, for example, with 14 hours of light and 10 hours of darkness, as well as constant temperatures, female cats will be in the breeding cycle year-round. The female is able to bear young as early as 7 to 9 months of age and is fertile another 7 to 9 years. Usually after that, the cat can no longer bear kittens, although there are exceptions.