that sucks man, it could have been mice??
Mice are what I am leaning towards. Some said it could be a squirrel but I haven't seen one around that is small enough to fit in there. Pretty awful man. I hate that this happened to my birds. I moved the box (now about 9 feet from the fence), made a new box that is easier to monitor, put on some heat guards and put up a baffle. Time to try again. Im also going to buy some rat poison too. It is war.