Not much tobacco being grown in the Tillsonburg area these days. I should know as I grew up on a farm less than 20 miles from Tillsonburg and still go back to visit family. The tobacco decline started back in the 80's and a lot of the tobacco kilns (barns) have been torn down.
Now they grow some weird crops such as hops for beer making or ginger root.
You won't find any birds or vermin in a tobacco kiln as there is nothing for them to eat there. If you want to shoot birds or rats you have to go to a cow/pig/hay barn where the feed is for them.
We did just fine with pellet guns when we were kids and there is no way a .22 shotshell will reach out to the top of a barn and kill a pigeon.
The add says a farmer should keep one of these on a tractor with them. Yeah I'm sure these would work well on a fox or a coyote. lol
Anyways I think these lever .22 smoothbores are just a fad and will fade away in the near future.