This is just my opinion. I assume that you meant popping pasturns, the cattle that we are raising for the show ring are all on the verge of being too strait. If I am looking @ cattle & am interested in a particular calf I will walk it for quite awhile @ a fairly good clip, if I/we see it snap a pasturn, we walk away. 9 times out of 10 it is a structural problem and in my experience they will only get worse as they get heavier & older. If you have one that is good and you want to try to help it out you may want to try some of these products, but IMO if you can avoid getting one with the problem, I would try to steer clear of the problem. Watch PPL with experience look @ cattle, one of the things that they will spend time on is movement and structure.