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.
Male cats will be able to sire kittens when they are about 5 months of age. They should not be used for breeding, however, until they are 18 months of age. Female cats generally are sexually mature when they reach at least 80% of their adult weight. The timing of heat in a female cat is also dependent on the amount of daylight. Thus a female cat may have her first estrus anytime between 5 and 12 months of age. Feral (free-roaming) cats may reach sexual maturity earlier than indoor cats. Although a female cat is sexually mature when she is less than one year of age, she should not be bred until she is 18-24 months of age.