I assume these electric tractors are limited to pulling? How long will an electric tractor pull an implement such as a plow or disc? I also assume it's unable to drive the PTO for a cycle mower or brush hog?
Carol, I'd like to think the dog would have enough sense to get down once it got too hot. Ha! I believe the dog you're seeing is actually a reflection in the glass! If you watch the video before that you'll see the dog do the circle thing and then lay down in the grass.
If that option doesn't work perhaps you could allow someone to shoot them who is willing to eat them? Or find someone who will take the ones you shoot?
With that said, each state has their own hunting and trapping seasons you'll want to look into before going one of those routes. Most states do allow nuisance animals to be taken out of season. Those are typically a completely different set of rules than those for hunting or trapping.