I have a business of sprites who just love to chew. How do I know what's safe and not safe for them to have? I use a bunch of old t-shirts as bedding for their cage, and at least one of them chews on the t-shirts. Is this dangerous? I give them a laxative as a treat and they don't seem to be exhibiting any problems. Thanks in advance for any help you could offer. [Posted in FML issue 2875]