One of the reasons foxes can seem to be attracted to dogs is that if a fox has denned up nearby, they consider the dogs a threat and want to protect their kits by harassing the dogs until they leave-- unaware, perhaps, that the dogs simply can't choose to leave their own yards (and that many wouldn't, even if they had the choice).
It is often to the fox's detriment, of course, as one slip up will leave them at the mercy of the dogs.
Doesn't seem incredibly likely with your situation, weird time of year when it began, but might help explain why even foxes that haven't been fed by misguided folk sometimes seem attracted to houses with dogs.
Unrelated to this case but interesting, there is also toxoplasmosis, which they catch from wandering or feral cats, which will make them bizarrely docile and tolerant of all sorts of interaction, which is often mistaken for distemper or rabies (and unfortunately for the fox, not worth the risk of trying to make the distinction to the average layperson, as being wrong comes with such a hefty cost).