Un Natural Horse keeping

In 2012 my young colt Sterling fractured his coffin bone.  This is a piece of my experience at that time.
So many lessons to be learned from one moment in time..  Since Sterling has been in the stall, I have been fragmenting the herd.  Two horses in the barn, three on the trailer and 4 on the track.  And with the exception of Sterling always being in the barn, they rotate.  Valentine is obviously disturbed by this turn of events. I'm pretty sure she is feeling x-communicated or at least, not in charge of things.  She eats outside and rarely comes into the barn, only when she wants to. She runs away  and feels generally distrustful.  Patches calls for whomever is not home but relishes her turn in the barn.  Jessie steps up and goes to work or stays in the barn whatever I ask of her.  Summer doesn't usually stay inside but does come to work and Harley never stays in the barn and is now earning his keep as a therapy horse for people in early days of recovery from addiction to drugs or alcohol instead of being Sterling's gelding!

Valentine Harley and Summer lunching at work

Whew and keeping horses inside - I find it hard to imagine why people do this when there is nothing wrong.  When the horses come out, even the really grounded ones,  they are spooky, flighty, worried.  It makes no sense to do this to horses on purpose on a regular basis.