Da Bird has been a life saver with my kitten Basil, he loves to watch the birds first thing in the morning but gets really stressed not being able to catch them and would take it out on the other cats. Now I just bring out Da Bird whenever he has been up there for more than 10 minutes and it really helps him take out any bird related aggression in a safe fun way(and helps the the other cats who would be on the receiving end of his annoyance). It's always been a firm favourite with Charley over the last year but with Basil it's actually a necessary part of our morning routine.
Poor thing is mangled now, will no doubt be having to stock up on replacements and the odd kitty copter very soon!!!