Last week OP had a really bad hairball obstruction. Sat. (after the vet closed) he vomited semidigested food. He had no stools. I watched him, gave Hagen's hairball remedy, and Ferretvite. He started eating again on his own and had pooped out a bunch of hair. By Mon, he was back to his old self. He is a rescue that is supposed to be about 5. Doesn't look it or act it. His teeth don't look that old, but they do have tarter buildup from the Cat Chow diet and lack of dental hygiene. This past Sat. (after the vet went home) he started having stools the color and consistancy of Bold mustard, maybe a little firmer. There is a noticeable odor. Not overpowering, but definitely rank. He's playing, eating, drinking, maintaining his weight, and none of the other ferrets seem to be affected. I looked up coccidia in the Archives. It sounds like this but I'm not sure. Most people mention green poop. I only saw some green during the passing of the hairball. Could this be a stress response to that problem? I would appreciate some input from anyone who has had experience with this. I'm waiting for my vet to return my call now. I also have 4 cats, 3 other ferrets, a bird, and a domestic skunk. And 4 wild gray squirrels being raised for release, which are isolated, although sometimes the ferrets sneak into that bathroom. Will they also have to be treated? I have not seen any of these symptoms in any of the other animals. OP has been in my home for about 3 months with good health. The most previous owner (the original rescuer) had him for almost a year with good health. [Posted in FML issue 2832]