My son (who is 9 years old) lives with me 95% of the time (his dad has a bad temper and really doesn't want much to do with him except at certain that are "convenient" for him). Per our divorce agreement, we have joint custody of our son (there was an incident last summer involving his dad's temper and I removed him from his house that night). Our son really doesn't like to go to his dad's house to visit (only to see his dog) and has said that to many people. To bring his dad back to court will cost quite a bit of money (which I don't have at the moment) to try to change the custody so that I have full custody of our son. At what age does the court let a child decide which parent he/she wants to live with?