we grew up in the country and had a big problems with feral cats and where we lived was a know spot to dropping off unwanted dogs.
the cats we would shoot or live trap them and then kill them. The dogs if they were friendly we would take them to the pound. If not we would have the pound come out and put a live cage trap for them. If there were aggressive we would put them down. Hell depending on the dog we kept some of them even. Did I take pleasure in killing them no but at the same time it did not upset me either. Do I agree with with how the girl killed the pups not really but at the same time it did not upset me. As for her laughing about it I will play the devils advocate and same that since she was speaking in Russian that they were talking about something unrelated to the pups and laughing about that don't know not sure. I do not think it should have been filmed.