I have received many emails over the past few months about using fleece, specifically polyester fleece for bird toys. I ask people, please don't use it, it is dangerous for birds. Polyester fleece is made from recycle PET plastic and ethylene glycol, yes antifreeze. These two ingredients are both petroleum derivatives not to mention ethylene glycol is highly toxic. If it is an absolute must that you have fleece for your bird use only organic hemp and cotton. You may not see the effect immediately, but you are shortening your birds lifespan drastically by using it.