Gosh, it’s pretty difficult for a dog that is not roaming around to kill many birds. Not impossible (one of my goldens once caught a bird on the fly as it flew out of a bush while we were hunting with her—but it wasn’t a gamebird and we released it none the worse for wear), but unlikely enough that unless they are roaming at large they are probably not killing enough birds to make a dent. I also advocate dogs being kept on their own property and under control.
susie
Most people in the country (no doubt where the birdwatchers watch birds) do NOT keep their dogs confined. That’s one reason why they move to the country—or so they say.
Excuse me but I know for a fact in the city of Buffalo alone...that there are so many dogs kept in fenced backyards 24-7 that kill tons of birds. THe owners brag about it. The dogs are all vicious and kept outside to guard their homes. Many many neighborhoods all over the country -—have dogs kept outside for that purpose-— to guard their homes. The dogs are good at catching and killing birds and do so in GREAT NUMBERS.