As a quite necessary and practical (nebbermind _all_ the other implications) thing, I am quite familiar with most all the regular mutts on my routes. And that's always a learning curve for each new paved path I take. I recall telling Mike (K) when came out last fall, "Watch this one", or "Nevermind that one--he won't leave the yard".
The odd thing about Ace is that I've ridden by his location dozens of times and never even noticed dogs--and he has a full grown "brother".
BIG surprise on that ride too. Lady who has huge wolfhounds penned up and _always_ six or more free-roaming, road-going, friendly chasers...had the whole pack hemmed up yesterday.
So when I get a route or two marked out here--there'll be some "K9" markings on the road too...for awareness.