I have no objection to anyone keeping animals, pet, farm animals or captive bred "wild" animals as long as they are being looked after and treated apropriately, and as close to "natural" as possible.
However, I don't think pulling owls from a small box, on stage in front of lights and a very loud audience is appropriate. I felt degraded for the birds.
Apart from the shock element, the act could have been performed just as well, or just as poorly, with stuffed toys or vegetables.
We do enough shouting about how animals are treated in other countries, but we are sitting back letting this happen here. I am not one of these animal activist people, but the sight of owls being used this way just sickened me.