So... now I officially feel like an arse.
Followed the yips to the apartment from which they were emanating, just now, because I just couldn't take it anymore. Asked the woman that answered if she could quiet down her dog.
Turns out it's a puppy that they're training, and I noticed that they had a huge tv with Bravo (Project Runway!) playing and I just felt like such a self-righteous intruder.
I also could have easily started a conversation and made a friend in my building, but I didn't. Why didn't I? Maybe I'll go back with some homemade cookies or some such peace offering.