This is not directed at you, as I am assuming you are a responsible dog owner.
But, you said the dog was a rescue. I'll assume that to mean the previous owner was not responsible. And that the shot is old shot working its way to the surface. I'll further speculate that perhaps the previous owner let it run loose and possibly molest farm animals, etc. In which case, in many areas, there is a justifiable and legal reason to shoot the dog. I do not blame the dog, as even though the dog is directly causing the damage, the irresponsible owner set it up.
Personally, I have no qualms about the shooting of dogs molesting farm animals. But it would be poetic justice if the irresponsible owner got a load of birdshot as well.
But, you said the dog was a rescue. I'll assume that to mean the previous owner was not responsible. And that the shot is old shot working its way to the surface. I'll further speculate that perhaps the previous owner let it run loose and possibly molest farm animals, etc. In which case, in many areas, there is a justifiable and legal reason to shoot the dog. I do not blame the dog, as even though the dog is directly causing the damage, the irresponsible owner set it up.
Personally, I have no qualms about the shooting of dogs molesting farm animals. But it would be poetic justice if the irresponsible owner got a load of birdshot as well.