In many places you have to have your dog under control even on your own property. Those dogs were not in fence or on leash.
Thankfully, not where I live. I had this discussion with my (new, from Florida) next-door neighbor (whose yard is fenced-in) a few weeks back when he started yelling at my wife about my dog being loose in our yard. while she was picking tomatoes in the garden. He was screaming at her about leash laws, even in our own yard, blah, blah.
My dog can run around in her own backyard without a leash, at least where I live...
I old him to feel free to call the police. He did. They came. The neighbor was quite docile when I presented this to the cop to read to him.
§ 127-16
Confinement.
All animals owned or controlled by any person shall be leashed, caged or otherwise physically secured by such person when being walked, transported or otherwise
while not in the private property of the owner or other such person in control of the animal within the township.