Kenneth - If you are looking for journal studies the best place to start would be at a university library. I have been trying to get a study on mustelids started and in the process I found alot of research on ferrets. Some of it is research on domesticated ferrets and some of it is on feral ferrets. I have come across alot of info on physiology as well as a few analyses on play behavior, scent marking, and dominance. I would suggest using a search on a fisheries and wildlife index under "Mustela" or "Mustela putorius". The journals you are likely to find info in are Animal Behavior, Canadian Journal of Zoology, maybe Journal of Mammalogy. Kristin [Posted in FML issue 1275]