Originally Posted by Mornai
The alleyway is less plausible than the dark room, as the room very likely had a door to escape from and was large than the alley, which had walkers swarming in from both exits.
Kenny is the only survivor whose fate is listed as "lost" and not "dead" or "died". If it were to be a confirmed death, it would have read "Kenny was killed by the walker herd trying to save Ben" or something to that effect.
I think that the end of episode status pretty much confirms that he is undead.