I have 4 cats, 2 of which are fixed, the other 2 are only 10 weeks old, but I'm curious at what age (female) kittens begin going into heat, and how frequent it is. Any help?
Welcome to the site! What age they go into heat depends largely on the cat. Just like people they develop sexually at different rates. The generally accepted time frame to get them spayed is between 4-6 months old.