actually the wax worms are underrated, and it was my mistake, its usually butter worms, which are like a shot of pure calcium. i do feed wax worms now though, to keep my females nice and fat. i dont want my females to get all malnourished after laying their eggs and all.ive fed my cresteds all types of worms except silk, meal, golliath, and super worms with great effects. as for age and size, all of my females with tails are 8 to 9 except one younger, which is 7, not breeding, and a tailess female which is about 4.5 s/v. my males are 9.2(largest in my collection) 8.5,8.2 and my tailess male is 5 inches s/v. the rest are sitting out this season, they breed in the fall.