Hi, not sure if this is how to post....newbie here....but here goes. I live in Hawaii and we have a LOT of geckos, several varieties, but the Madagascar Gold Dust Day Geckos (I call them geicos) everywhere! They pretty much have the run of my house which is fine by me because they are pretty and fun to watch. But occasionally I'll see one pulling something white from its back end. I can't get close enough to make out what it is. At first I thought it was pulling an egg out, but then it ate whatever it was. What am I seeing?