Last year I was dog-sitting my friends 110 lb Golden Retriever (Max) and was walking him up a trail by my condo. I look behind me and he was rolling around in the grass. Me, not knowing that much about dogs, continued to walk and called him but he did not follow me. So I went back to where he was and he was rolling around on a dead rat - a HUGE rat - that had obviously gone to the RB days before. I was so disgusted! But, from what I hear, most dogs do that.