[SwankyC]

recall Rick saying that upon seeing a zombie for the first time his instinct wasn’t to kill it.

So you're recommending killing a little girl thats suffering from some unknown malady. Congrats, yer special.

[Tublecane]

The little girl wasn’t the first zombie Rick saw, though it may have been the first one we saw. I don’t remember whether it was necessary to kill that particular zombie. They do it to get them out of their way or to prevent being eaten, not upon sight.