I raised a small handful of cows for a bit growing up. Tipping them over never crossed my mind because they're huge, heavy and strong. You would have to use a tractor or other machinery and that's just animal abuse at that point.
I don't know if it was the same thing, but I grew up hearing that if you mix your drool/saliva before brushing with rice and feed it to chickens, they would die.
For those who have tipped, you can breathe a big sigh of relief. Per Baby Jesus®, to err is human to forgive is bovine. And either way cows aren't exactly smart by vertebrate standards.
I recently came to learn that there are tons and tons of people who do not think cow tipping is real or possible. Having grown up in Dairyland: It's real, it's possible and it's kinda funny being able to so easily knock over something so large.