That horse and 1 cowboy with 2 Border Collies was able to move 200 head of cattle.
The cowboy was able to cut the bulls out of the heard and seperate them before the cows entered the lanes. The bulls are leased for 90 days at $1500(they would cost over $10k to purchase one) they run 15 bulls on the ranch. Very efficient operation, why feed 15 bulls for 9 months out of the year when their work is done in 3 months.
Obviously a highly-skilled cowboy, horse and Border Collies - -Wow!
For them to get 200 head (and 800 legs) to go where you want is admirable.
I saw something recently on RFDTV about an operation that leases bulls. That was their primary business. Was in the "west," don't recall where.
I think the rancher said they leased 900 (?) bulls out....
Was astounded by the magnitude.

Lot of Dairymen in the northeast use AI. Some used to run a Jersey bull with heifers on summer pasture for small first calves. Now, some will breed to Angus so the first-calf bulls have some beef value. Seldom saw a Holstein bull on the farm, although some did keep them.