The old Hollywood adage is never to work with either. I played for a tiny family gathering today with Andy the guitarist. It was suggested we play under a tree next to the hens. Birds seem to like wind instruments in a way that mammals don't. These chickens were singing along merrily so I asked a boy of about eleven to take a picture with instructions to get the chickens in the shot. 'Take as many as you like,' I said. When I got home and looked at the camera I found 230 pictures, only one of which had the birds in shot.
In retrospect their voices didn't carry especially well. We weren't using amplification apart from a little boost to Andy's nylon stringed guitar. However, I appreciated their moral support and they certainly gave us a stage presence we may otherwise have lacked.