Absolutely. Deer notice changes in their environment. Why do you think a blind sometimes spooks them, your truck parked in the field keeps them out of the field, they avoid shooting lanes that have been cut. They most certainly do notice, and care
Then tell me why I have cut numerous lanes, had deer walk up to my truck when I was standing there with my gun in hand, had deer walk under my stand 12 feet up in the air on a sweet gum tree with no background to break me up and wearing MO Breakup, had deer walk up to 15 yds while I was pulling up my pants after relieving myself? Huh, Huh, Tell me Mobow The Great. Guess WE may never have all the answers. I do know this, as well as a few other things, I will use Anything that gives me an advantage over a whitetail's senses or his ignorance. Guess we will never know how much they care huh?
LT