Do watch that drive doesn’t become an obssession.
Over many years and horses, so rare, we had two cutting bred geldings that lived to herd, not so good in a pasture with horses that didn’t need herding ALL day long!
One was a dun son of cutting bred top reining sire Topsail Whiz and himself won two small reining futurities as a three year old, was then shown in working cowhorse.
He was also like riding a jackhammer, you got off him stiff and sore.&
Turned out with a handful of ranch horses, he spent the day and night herding them, at times boxing them in a corner and keeping them there for hours.
He was very sneaky about it, no one ever questioned him and fought, no marks on anyone, no one tried to run off, he seemed to quietly, slowly hypnotize them.
He went to live where he had individual turnout.
The other was a cute wonderful sweet appaloosa word champion senior reining, also with working cowhorse background.
He was turned out with four other geldings, three retired older ranch horses.
They were turned out in mile long pasture and he became their boss, again by mutual agreement, no bites or chases.
He spent all day driving them back and forth the whole mile, letting them stop to graze here and there for a bit, then driving on.
One of the geldings would try to slip away grazing, horse would notice an go over to push him back with the others.
Driving them to water, he would let them get a drink, but not linger in the pens, back to driving them.
One old horse was getting foot sore from all that day and night on the move with little rest.
We put driving horse on an adjacent pasture across the fence from them an guess what, the herd stood by the fence, across from him, napping and grazing, waiting for him!
He didn’t care, would go out to grace, come back to drink and be fed, rarely go stand across the fence from them, mostly ignoring them.
We found him a better place and the others, without him along, went back to their old, normal horse herd behavior.
OP, telling you those detailed experiences so you can be proactive and watch that your filly’s strong cutting instincts don’t go astray into unhealthy, obsessive behaviors.
Lucky to have such awesome filly, very nice crosses in her pedigree. I knew some of those horses, we stood a super nice son of Jessie James that had been state cutting champion.
Filly will do great with you.
Oops, this got too long, sorry!