I think I'd be looking into finding a different dog walker too. Maybe they had a good reason to leave the dog outside (like an urgent nature call) but I'd be a bit upset if it was to get a morning muffin.
Luckily, both sides of our family are insane animal lovers with more resources than we have, so I can say that I would definitely pay 15G for Zena. I'm a bit of a scammer, though, so I'd figure some way to get the money back. Dog napping should not be encouraged(obviously)