Our big, stocky, monster with short legs has scaled 6' fences, gone under them, and through them. The "collars" didn't work(probably because he has no threshed for pain and his neck is 26" around)
We ended up getting an 8' fence and electric cattle fence as a last resort and running along the bottom of the fence. The first day he backs into it and shocked his b@ll$... Hasn't gotten out since
little does he know it hasn't been plugged in for about a year.