I keep 10 steers on our property and sell folks beef ( 1/2, 1/4, etc). I have learned that cattle are stupid beasts. They are motivated by one thing - food. If you don't have the right fencing, and they want to get to something they think looks tasty, well, they will pretty much go where they want. Then, when they get there, they will poop all over and since they are curious critters as well, they will knock over about anything that's not fastened down. That's just the way they are. It looks like you had first hand experience at cattle behavior. It's a good thing they taste good or I wouldn't have any either.