Advertisement My three balfouri slings share a box. Because of burrowing and heavy webbing and their generally skittish nature I haven't seen much of them since I got them last September. Yesterday I've actually managed to see all three of them and now I'm concerned: While two of them have grown a lot and already show their adult colors (I think have both molted twice), the third one hasn't grown at all. It looks tiny compared to its siblings and I don't think it has molted at all. It looks a bit too skinny for my taste, too, though the abdomen is still a bit bigger than the cephalothorax. Now what do I do? Should I separate them and put the runt in an extra box by itself? Or will it still thrive and just needs more time than its siblings?