How do you get rid of the blighters? They have invaded the stable/feed room roof and are trashing it. Shredding the hardboard liner, wreaking havoc on shelves, stealing food. The last straw was a blocked drainage pipe from the sink, they had stashed about a mugful of corn (stolen from the chickens), packed it into the pipe and plugged the end with shredded hardboard. I can't even get how they did that, does one stuff the corn in while another stops it all falling out? They are far too quick and have too much cover to use an air rifle.