Squirrel ● literally ● bites off more than he can chew !

Please read the description after watching the video to fully understand what was happening and the predicament I was in. I’m an inventive guy and I had an idea to build a squirrel proof bird feeder but before I did that, I had to find out one thing about squirrels and that was what is the smallest hole they would attempt to go through to get to food. I searched google and found no information. I decided the only way was to do a small scale experiment on my own. There are about 7 squirrels in my neighbour