I have a two-year old sheltie who has always been very well-mannered, dainty, and clean; he never behaved in a gross manner in any way, even when other dogs around him would do things like roll around on dead animals. However, recently (within the past month), he has started rolling around in poop. He has done this 4 or 5 times, and my husband and I are completely perplexed because he NEVER did this before, even though he had plenty of opportunity to. Why would he suddenly start doing this, and what can we do to get him to stop? We were able to catch him in the act once and reprimand him; usually this is all it takes for a behavior to cease, but he continues to do this. Bathing a sheltie is quite an undertaking, so it would be nice to break him of this behavior, as we have to bathe him every time! Any advice on why he's suddenly doing something that he never did, and how to make him stop?

