We’ve a old open fronted shed used to store machinery and there’s pigeons appeared and they are messing all over the equipment. There’s no food source in the shed or close by and it’s not enclosed from the weather really so not ideal nesting. I don’t want to shoot them because I’d damage the roof which is presently in decent condition. A gas banger would be the last resort as we’ve industrial units right next to this shed. Anything else I can try ?