I don't have experience with females, but I've had my male panther since January and yes his appetite varies. Normally when he gets ready to shed his eating slows down, sometimes he stops eating. He also goes on hunger strikes. The last one lasted a few weeks and he would only eat 1 or 2 super worms every few days. I just make sure he's very hydrated when his eating slows down and when he's hungry, he pigs out. He's kept a very steady weight. I've never seen him get skinny or dehydrated, he's very active all the time and when the lights turn off he curls right up and goes to sleep.