With one cow mixed in with the horses and sheep I needed some help. Grabbing Reba by the collar I called Joey over. Gesturing in the direction of the cow I shooshed him up. Looking at me a little confused (he's always on sheep at my place) he quietly walked up to the cow and bit her hock. Using my shrillest happy voice I told him how wonderful he was and he came trotting back to me for some pets. Doing it again I once more asked him to move the cow. Same thing, a nice quiet approach and a bite to get her moving.
The next day I put him on the sheep. And he's actually slowing down. He's starting to rate and isn't in a crazed or hyper state when we work for increasingly long periods of time. We even did some directional work. I was so pleased with him. The bonus was that all of this was done freely - no cord in sight!
My plan is to move him onto cattle permanently and hopefully try our hand at some cattle trials.