I think in real life, separate from TWD, that episode had to have an impact on Tyreese and Carol........The only thing I can think of that came close to what was done was when Ol' Yeller had to be killed.....
Although not a TV Show, I recall Bruce Willis character in the movie
“Looper” killing a child thinking that child was the “rainmaker”.
I agree. I think Melissa McBride even said something to that effect on Talking Dead last night. "Hard" is a word that doesn't even begin to describe it.
You know, upthread I said Carol was tough, but she isn't a robot. She does what she believes has to be done, but look at what she's been through. She not only lost her own daughter, she saw one of her "adopted" daughters murdered in cold blood, and shot the other one in the head. I wonder if she can bear all of this without crumbling.