My guys have never had issues being in the same room with the following: - Rabbits (actually were out at same time as rabbit many times, but was a large, large rabbit) - Flying Squirrels (squirrels had issues with the ferrets, thus I adopted them out to a wildlife biologist and they have a wonderful full finished basement to play in and I get nice pics of them up his sleeves :) - Rats (like I said before, some rats were squeamish of the ferrets but one played rough and tumble with them, a hairless rat, and I used Lucy to "gather" them out of my closet once - she scruffed them and brought them to me) - Mice (yes I had one mouse who got out and was killed - but the ferrets never acted crazy just because they were housed in the same room) There is probably more I am forgetting but the squirrels were in the same room as the ferret rescue in an open bird cage. I think the advice is more of - be aware that when your pets eventually escape, from accident or just a persistent pet - your ferrets may or may not end up killing them... Laryssa [Posted in FML 6231]