my yearling redfoot is continually flipping himself on his back. it seems he tries to climb up the side of the enclosure ( a 4x8' screened outdoor cage) and he flips himself on to his back. i tried placing boards on bottom of the sides so he can't see out, but he keeps doing it anyway. i've tried forming his substrate (dirt) so that it slopes down hill around the sides, and i've also tried it where the substrate is flat (perpendicular to the sides). i've tried making bumps and stuff so that if he flips over he can right himself, but nothing works. i check on him several times a day and lately i've been finding him upside down once every couple days. what should i do?

