Here at home I have a large household: a cat, a dog, a rooster, three horses and a goat. But I have to admit, all of them are quite "useless" in traditional sense. We don't ride horses for past 10 years, last time we milked the cow was around 6 years ago, the dog is too friendly to bark at people and the cat doesn't catch indoor mice, she is only interested in wild ones, and only the rooster has some "useful" functions - he is regularly pecking our guests' feet.
Read more about this photo here: http://wildlife-photo-russia.blogspot.com/2012/12/here-in-bryansk-forest.html
Or in Russian here:http://shpilenok.livejournal.com/144137.html