When we were young, there seemed to be only a few dogs roaming the street. I didn't know anyone who owned one. By the 70s and 80s there were loads of dogs, but there were no rules then about always having them on leads so they just wandered about - like cats do now. And dog poo was everywhere!
Now they must be registered, chipped, walked on leads (in some places), neutered if rescued, and if we see a dog on its own we report it. I can't remember XL dogs back in the day. Mind you a Rocky can frighten the life out of me.
I don't know if dogs are now happier but they are definitely safer, and at least owners know what they've been fed. As years ago dogs would wander into other people's gardens and homes, and receive treats from all over the place.