Never grab a dog by the collar. Even a non attacking dog that doesn't know you will likely bite you for doing so. That is why animal control uses catch poles.
Dogs off their territory and on someone elses property aren't thinking like pets. They think like the predators they are. If I called they sheriff instead of shooting the dog myself, the sheriff here will most likely shoot the dog or if they take it to the shelter, the county will kill it. There is no second chance for a livestock killer. This does not get the owner off. They still get fined and have to pay for the dead animals.
Dogs off their territory and on someone elses property aren't thinking like pets. They think like the predators they are. If I called they sheriff instead of shooting the dog myself, the sheriff here will most likely shoot the dog or if they take it to the shelter, the county will kill it. There is no second chance for a livestock killer. This does not get the owner off. They still get fined and have to pay for the dead animals.