Humidity levels? Temps? How do you regulate them? Enclosure? Setup? Explain as much as possible for a more accurate diagnosis of the issue. My boas are never wrinkled, unless they are going into shed. My routine of feeding is every seven days. I feed a nice meal (nice lump) to all un-fully developed boas. My adults get fed after they all poop. Mostly that is every 14 days or so. I'm guessing it's not a big enough meal or too low humidity.