Hi, I own a rescued 7 year old female bearded dragon. She lives alone and has never mated or lived with a male beardie. She's layed infertile eggs before and has started her constant digging again. Her current bedding is newspaper/paper towels. My question is to avoid her being egg bound and not laying the eggs should I switch her too a loose substrate like a sand/top soil mix for her to dig in or is it fine if I leave her on newspaper?