i thought the small chubby one was going to molt untill i saw the red stinger, i thought they didnt molt once there stinger was red. so i thought maybe they had sex and its pregnant but i dont think so becuase they never come out of there burrow and i dont have a flat slate for them to have sex on. the small chubby one looks too small to be an adult but i dont know why its stinger looks red then.