About 20 years ago I was working a table at a gunshow in Albuquerque with a suppressed 10-22 on the table. A gentleman said, "I NEED one of those." Now I'd hear "I want one of those" frequently but this was new to me. I asked why, expecting that he had just expressed himself strangely. As it developed he had a major pigeon problem in a steel fabrication plant. The pigeons were whitewashing the equipment and it was a health hazard. He could not use a regular 22 or shotgun within the city limits because the neighbors would call the police and traps and cats didn't work well enough. After a few minutes conversation, I had a job as a hitman! I found the suppressed 10-22 was too much, it shot through the pigeon and the corrugated steel roof too. A Remington Nylon 11 with a muzzle can and CCI CB Longs was just right, even a miss would not shoot through the roof, but would drop the pigeons. Lots of fun, but the plant closed and the rest of the pigeons survived.