I also found out about a couple living in Birmingham who view their pigeons as art:

'Alexandra Lockett and Ian England are artists, but when it comes to security they have a much more relaxed policy.Every week a van arrives to collect Lockett and England’s precious work, which is then driven to a far-away town or city before being tipped out of baskets and tossed to the winds.Luckily Lockett and England’s art is super-smart and invariably makes its way home. That’s because the Moseley-based artists, who are also a couple, don’t produce paintings or sculptures – they work in the medium of pigeon.While most artists hide away in a studio to produce their works, Alex and Ian have a loft – a pigeon loft. They are the proud owners of 20 homing pigeons and are also members of Aston and District Pigeon Flying Club.There are many pigeon owners in Birmingham, however Alex and Ian are the only ones who view what they do as art, rather than a hobby. They call their work Project Pigeon – but is it really a bona fide form of creative expression?
“Art is about making people think about something or look at it in another way,” says Alex. “And that’s what we are about. This project makes people think of pigeons not as horrible, diseased rats with wings, but as creatures that can actually do something.”
Two years ago, when Alex and Ian started Project Pigeon, there was a spectacular launch.“We hosted an exhibition where the pigeons carried small works of art made in different studios around the country.” says Alex.“There was a live opening – people came to watch the pigeons fly back to the loft, carrying the art works with them.”The couple regularly open their loft to the public, and have run workshops with young offenders, teaching them maths, history, science and geography – from a pigeon perspective.'
From: http://www.birminghampost.net/life-leisure-birmingham-guide/birmingham-culture/birmingham-art/2011/01/30/project-pigeon-takes-art-to-the-skies-65233-28082245/#ixzz1DqR6jhuu