What the heck is with "Bones" this season?

Last week, Dr Emotionless Brennon broke down almost sobbing about a bunch of dogs. The woman works on murder cases on a regular basis, sees horrific things happen to human beings every week, and scarcely bats an eyelash. But a bunch of dogs being forced to kill each other makes her break down? The entire episode was a commercial for PETA.

Now this week, everyone goes all ga-ga for their “friend” Zack, who (for all they know) plunged a knife into a man’s chest to kill him, and who has shown no remorse for doing so.

When did this show stop making any kind of sense?

(Btw, I’m not even a little bit condoning dog-fighting, so please don’t go off on me there. I’m pointing out the absurd logical inconsistency in the show)