http://www.smartgroups.com/message/readmessage.cfm?gid=1423922&messageid=1257 I can not find anything in the PDR about Enacard (or the human version Vasotec) changing the glucose values. I do not think it will cause any problems even in an insulinoma ferret. Since he is doing better on it, perhaps he does have a heart problem after all. Jerry Murray, DVM [Posted in FML issue 3895]