what is your friend using for litter??? if she's using the pine pellets, that might be what is the cause of the allergy symptoms. allergy to conifers is pretty common. hardwood pellets can also cause problems if you're allergic to the hard woods that make up the pellets - some woods like maple are also fairly common allergy triggers. plain newspaper sheets or the yesterday's news pellets would be the alternate to the wood pellets. what about dust?? ferrets get under/behind things easily and it could be the dust on their fur that's the issue. joclyn [Posted in FML 6568]