Here are some links that i found on pine causing repiratory problems in ferrets... Ten Tips to Help Keep Your Ferret Happy and Healthy - ... Do not use cedar or pine chips as litter for the litter boxes or as bedding in the cage. These products may cause respiratory problems in ferrets. ... Frequently Asked Questions - ... No. Cedar and pine chips will cause respiratory problems in ferrets. You should use a ferret specific "pelleted" recycled paper litter in litter boxes. ... http://www.everythingferret.com/faq.htm Potty Training Ferrets - ... 1. Use a dust free litter like Scamp 99% dust free clay, Feline Pine pellets, Pine Fresh pellets, Cat ... These can cause respiratory problems over a ... http://www.ferretcentral.org/for-others/litter.html Billy... [Posted in FML issue 4422]