BTW, the most common concentration I have heard used for ferrets is 1 mg/ml but my point was since there are higher concentrations such as the two I mentioned the ferret might have been on a less dilute version before. It is important to take concentration into account for medications, in fact, it can be lifesaving. -- Sukie (not a vet) Ferret Health List co-moderator http://www.smartgroups.com/groups/ferrethealth FHL Archives fan http://fhl.sonic-weasel.org International Ferret Congress advisor http://www.ferretcongress.org [Posted in FML issue 5057]