A few nice animal rights images I found:
Zoo Awareness Day, Whipsnade Zoo 2008 _G102961
Image by fotdmike
Toward the end of the event everyone had just about had enough... including the photographer, who had taken to shooting all sorts of random objects! (After all, there's only so many photos you can take of a smallish demo!)
Bedford Animal Action staged a demo at Whipsnade Zoo near Dunstable on Easter Monday to mark Zoo Awareness Day.
Details of the event are on their website.