Very good for a start. I like your storytelling abilities and it's got a lot of promise. The art is interesting, while it could do with a little work, I do find it quite charming and unusual. The animals in a apocalyptic world is an interesting concept; it's not been done that many times before, and it's interesting to see what is going to happen.
Perhaps work on the animation of the animals a little more; it's the little movements that make them believable as characters. For instance, when Zale ran past Elva, wouldn't Elva simply turn her head around, being an owl, rather than turn full circle? You can actually find a lot of help online these days; animated gifs work well for you to work off so you can see how a fox runs or an owl moves in certain situations. If you manage to get this down, your characters will have a lot more believability.
Good job though, and for all your time constraints and other factors, you've done well here. Looking forward to seeing more from you.