I took in a leopard as a foster a couple of mos ago. About 2 weeks ago she laid 12 eggs in my yard. I got them into my incubator at 86* the same day. She came to us along with a sulcata. Don’t know much more than that. I did some research on how to take care of them but I didn’t find how long before you know they are fertile. I’ve seen the Utube videos on candling and chalking but it doesn’t say how long before chalking happens and when to do candling. Anyone know? TIA