One of my cats brought in a young wild rabbit. He had two small bite wounds on him which I treated with an antiseptic. We have placed him in a kennel covered in a blanket with access to food, water, and greens. I think if I release him, his wounds will become infected and he will die, but as long as I have kept him, he won't eat, drink or move. He is in shock. I am completely unable to take him to a wildlife rehabilitator at the moment, and I've tried consulting google for what to do to no avail. Is there anything I can do for this little guy aside from letting him go and hoping for the best?