At what age do cats go into first heat?
A cat can go into the first heat as early as 4 1/2 months. However, there are some, which may take a bit longer than that depending on the cycle. Read more on that at http://cats.about.com/od/reproduction/tp/catsreproduction101.htm.
6 months and then every 6 months after wards
It truly depends. It can occur at 4 months. This is very annoying to hear I know. If its in heat let it finish it's cycle and have her spayed:)