Sometimes the black holes make them nervous, but just resist the urge to open up the windows anymore than you have too. The deer on my farm dont mind a new blind right away. I usually only brush it in slightly to break up the shape, otherwise, especially in cornfields the mice tend to take over and make a mess and chew everything up.Wearing black is probably best, just dont open any windows that allow the sun to shine in on you.We do all of our hunting from portable and permenant ground blinds.