I doubt parasites are the cause because your lil guys are cb. It probabaly has to due with the food. If my easterns are on toads, I feed them twice a week. If they are on mice, I feed them once a week. It's like comparing a fillet of fish to a big meaty steak. Mice are a lot more filling and fatty. It seems that it is too much for the lil guys to handle. Try feeding one pink per feeding. If that dont work, 1 pink a week. Keep temps in the mid-upper 70's and a basking spot in the low 80's.