I have a small suggestion if it wouldnt be too hard to add. Seeing as the goal is to escape the zombie infested town and you have to go outside eventually i guess.
I play other games similar to this one and not a single one has any animals besides dogs and rats. I always wondered if animals can get infected then why not more vicious animals? Like a boar or bear for example. Is it possible to add a bear like Days Gone has?
That game has a almost boss level bear enemy that will kill other zombies to get to you. I was thinking that would add tension if you are outside too long.