I have done rock climbing many times - Carderock maryland and let me tell you, these fat cow won't make one step up. What this cow is climbing is you can pretty much put your whole palm and pull up, now trying using finger tips with 2 or 3 fingers.  Story: My friend went up, about same weight, so what we did was I tied myself to a tree while holding on to him, he fell, and I flew up in the air. This cow would move jupiter up if it fell.