"About an hour" looking for a wounded big game animal and giving up is absolutely ridiculous! You should take the time and cover every square inch of land within a large area where the deer was hit and quitting after an hour tells me you didn't do any such thing. One hour is not enough time to thoroughly cover anywhere near the area you need to. If this just happened today, I would strongly suggest you get your rear back out there and do the job properly and maybe take some others with you that know how to track or what to look for if that's possible.