Actually for a group of animals like this one shot would do the trick. The sound of it would send them running. If one fell down they would scatter even faster. It looked as if the first one was holding a pistol but I didn’t see anything about a gun. The elderly vet surely should have his own gun, though, with a large magazine.
First one did have a pistol; they all came out with a rifle, a suitcase and looked like a heavy flatscreen TV.
They all need killing. Mr Kimber would love to do it.