This is getting too deep. It's not like you're pulling back the curtain on Abu Ghraib here. If you are worried about it just call the cops on a noise complaint. If the cops show up and something is wrong then they can take care of it. Unless the dog person is tied to the Russian Mob I wouldn't worry about it. It's not like 1 complaint to the police if found unwarranted is going to spark a backlash on their business.