according to what i have read, it is recommended to start slightly cutting down their food and temps when they can begin producing eggs. this is around 6 months of age. in this blog, it goes over when to begin cutting girls food and temps down, how to tell when they are carrying eggs, how and when to set up a laying bin, all of the things an owner needs to know when they are caring for a female https://www.chameleonforums.com/blogs/jannb/345-egg-laying-laying-bin.html