A/V Heart Block (The worst is 3rd degree, the next worst is 2nd degree sinus because it often worsens to 3rd degree eventually, plain old 2nd degree is more easily managed and less likely to worsen, and 1st degree is usually not a worry.): <http://pets.groups.yahoo.com/group/ferrethealth/files/Disease-specific%20files/> and for later info look it up in http://ferrethealth.org/archive/ which is an easily used treasure chest that Pam and Eric Sessoms so kindly provide (Pam put together the Files section of the FHL, too, which is where that earlier compilation lives, and is one of the FHL moderators.) mast cell tumors: http://www.afip.org/consultation/vetpath/ferrets/Mast/mastcell.html Sukie (not a vet) Recommended ferret health links: http://pets.groups.yahoo.com/group/ferrethealth/ http://ferrethealth.org/archive/ http://www.afip.org/ferrets/index.html http://www.miamiferret.org/fhc/ http://www.ferretcongress.org/ http://www.trifl.org/index.shtml http://homepage.mac.com/sukie/sukiesferretlinks.html [Posted in FML 6238]