I had a building with truck tire racks in it and the birds would put the white frosting on the tires like they where on the clock and the boss was watching. I shut the big sliding doors and laid the Anhydrous Ammonia vapor hose in the walk in door , let it blow for 30 minutes , that was the end of the birds for over a year. It did turn all of my multi colored work orders one color. My only thought about shooting them or gassing them is you will have to crawl in there to get out the bodies, the smell will be bad and only get worse the longer you ignore it . School of Hard Knocks .My front porch, 12 gauge and a possum , it had turned to jelly before I gave it up and went in under there to serve his eviction notice , there was a blanket of maggots under it. Vicks suave under and in my nose made no difference. The stink was 30 foot around the porch , make ya spit non stop. I dumped two gallon of bleach on the ground after I was done, it was a big improvement. Maybe Moth Ball will run them off.
