I think the problem was the meal size they were getting. At the shop, the juvenile had been eating 1 hopper every 7 days, but I swear that based on the 1.5x girth rule, he'd be fine eating a regular mouse. The female was being fed a small rat every 7 days, but again... I bet she'd take a medium rat just fine, and that would be closer to 10-15% of her body weight, too. Thanks for the insight; I'm going to start feeding them the slightly larger prey on a 5 day schedule.