Sounds exciting to me! No sense being disappointed in getting a deer agitated. It was in the best interest of her survival to be alarmed. If you were a big cat or a coyote putting the sneak on her , (and you were as far as she was concerned) , her reaction of telegraphing alarm warned both you and other prey that her Spidey senses were tingling. You being rattled by prey detecting trouble is just what helps prey avoid your assault. Or did in this case. An experienced cat would pounce/charge if in range, if not in range what would it do? (Maybe twitch it's tail after freezing initially , while cussing; and start trying to detect the next opportunity). And a young cat , or cat of any age (let's call him Mac..) could react in multiple ways. But freezing is not unlikely. Developments could change in Macs favor. Or as with many predator prey encounters , simply equate to , "try again". Pursuing alerted prey without the element of surprise or a team effort with other predators could likely result in a loss of energy without success. Countering survival of the predator. Even if you (or anyone) didn't freeze in reaction and decided to take a shot instead , a cranked up deer is a tough archery target. And when (if) hit is going to react differently than a calm pre-shot one. You had a deer get wise to your presence. It will happen again. And you'll get aware of them first again. Eventually you'll get a poke at a desired target that is not aware of your presence. Till then , mind your scent/vapor trail and do like me and envision a tired old hard of hearing bleary eyed dry nosed buck tottering into range. L.o.l..