I own a flat in a block of flats. It's a pleasant place mostly.
New neighbours have a pitbull type dog that actually seems very sweet but is never on a lead. It will rush up to people curiously but never barks. Sometimes i encounter it in the stairwell on its own.
I don't really like that it's running around off-lead in our garden or corridors. I spoke to our (off-site) building manager who said dogs should definitely be on a lead and that she'd speak to them. (Neighbours are the flat right next to me.) Building manager then got back to me and said, "The people at Flat X said they don't have a dog." So problem solved?
I've spoken with neighbour a couple of times along the lines of, "Could you hold him?" but they took offense.
WWYD? Just leave it?