I believe he can fully decide at 16. At 14 the judge will take a VERY good consideration. He at 14 will have more pull with the judge than say an 8 year old. It can be argued that he is "maturing" and needs his fathers guidance in certain aspects as a daughter would need her mother more. The judge will have him take the stand and ask him questions...just have your grandson be honest that he loves both his parents and that this is hard for him, but he feels that he needs his father more in these next few difficult and confusing years. The mother can always fight it...especially because it would mean she has to pay child support. At 13 the child is old enough to choose not to go on their scheduled visitation. What about if your son and his soon to be ex can come up with some kind of schedule that works for both... like rotating a week and a half each at a time or 4 days for dad day 3 days mom and than 3 for dad and 4 for mom and just continue the rotation..my girlfriend and her ex live in the same town and school district so it works well and they have equal time and they dont have to wait everyother weekend to spend time with the kids...hope this helps and good luck

