Yea, we actually let them out alot!
They go buzzerk! It was too funny when we let the black one out in a NON-FENCED front yard....he was all over the place!
Alot of times we would put up a guard on the front pourch and let them run around without us watching, except we would watch out the window so they wouldn't notice...Just incase they wanna fight, we could stop them...