Stand in the trough Jack! Then you only need to watch out for heads instead of whole bodies!! Leave a spot in the middle clear to stand in.. they figure out theres nothing in that spot and move to the side, thus clearing your escape route.
When I was a kid... back before computers and cell phones.. we used to have a lot of family get togethers. All us kids would be out in the pasture.. The cows learned that when my aunt rang the dinner bell that they had been grained, so they would make a run for the feed trough.. For them, and for us, it was first come first serve.. So the first thing you did was run HARD and catch the closest cow by the tail... The three hundred yard run to the house then became a matter of NOT stepping in a cow pie and going down as your feet touched the ground about once every ten feet... If you did it right, you beat the other kids to the house. If you hit a cow pie.. you got stripped down and washed off with the HOSE RIGHT on the porch... Well water is COLD so its really embarassing....