Good Morning, Afternoon, Evening, Night!

Good morning Gan'G. Haven't seen any snow here............yet! Don't want to tempt fate though.
There's a local glass bottle milkman here - but I don't drink milk - not since school days and the incident with a bottle of sour milk. The smell put me off milk for life.
When I lived in Tasmania, the milkman would deliver glass bottled milk to all the nearby houses, including ours early morning and we found that the bottle tops were being broken and a few inches of milk would be missing. Being Poms, we had no idea whether there was some local wildlife that would do this (imaging a giant Blue tit with a beak like a woodpecker) - so we asked the neighbours and they didn't know of anything but, how strange, the same thing was happening to theirs. The more neighbours we asked, the more cases we found.
After a few weeks, we heard that a big brown dog had been spotted, following the milkman on his rounds. The dog would nip into the house that the milkman had just visited and scratch the foil top enough to get its tongue in and slurp up the milk. Then, it would move on to the next house and do the same.
Can you guess whose dog it was?