In slight defense of the brother and his willingness to let the dog bark, I must say that people have varying levels of sensitivity to barking dogs. I get called all the time by people proclaiming how disruptive for their sleep their neighbor's dog is. Sometimes it's a legit complaint, but other times I have to make a concerted effort to even hear the dog. Some people are just really, really sensitive to noises. The same can be said for music and TV noise in apartment complexes.
"...you can't lose what you don't put in the middle... but you can't win much, either.