Maybe it's the more open environment in ND compared to my small operation, but I've found just the opposite. The more sheeting, the smoother and calm the cattle work.  I even worked with my For-Most dealer to exchange my pipe No-Backs in the alley for For-Most's solid sheeted horizontal sliding doors.  The next cow in line in the alley stays a lot calmer not watching the vet's backside as he preg checks her buddy up ahead.  I also put plywood on some pipe gates.  I think Dr Temple Grandin recommends sheeted and limited sight lines in all her designs.