I'm the Marketing Director for Priefert and I'm happy to see most of you have enjoyed your experience with our products. The tapered yoke has long been a topic of conversation. This is one of those things... some people love it and some don't. The reason for the yoke is based on hours of observation research. Most animals will take the path of least resistance and keep their neck in the widest part of the yoke for comfort. This keeps the animal standing and normally a little more still. When the headgate is straight (which we have experimented with) the animal has full range of movement up and down and tends to thrash more in the chute. Ultimately this results in more cattle balking and going down in the chute. Since the Priefert headgate has an infinate locking system instead of pre-set or fixed system, the idea is that the operator can simply move the handle a couple of inches making the cow think the gate is opening. This slight movement normally makes the cow stand to her feet and raise her head into the correct position while you finish what you are doing.
Another thing we do to try to take pressure off the animal is contour the sides of our chute. A squeeze chute is really improperly named if you think about it. It should be called a "restraining" chute. We don't want to squeeze an animal we want to restrain them from hurting themselves or the operator. Since cows are round not straight, the contour on the sides wrap around the belly and takes a lot of uneccesary pressure off of her.
I can sure see the arguement from both sides. Next time a cow appears to be going down into the tapered yoke, try taking opening the headgate an inch or two and see if that works for you. I think you'll find most of the time the cow will stand and then remain standing in the correct position.