We knew there was a roaming rodent in the barn - we heard it scurrying, hidden from view by some old junk. The we saw a furry four-footed shadow dissappear between the wooden logs. Chicky noticed it, too - she could also smell it. The next few hours she she was alternately sniffing and sitting perfectly still, hoping to catch it. She had more patience than I had - I went to bed eventually. I have no idea if she caught it.