need help with separation anxiety issues in young horse

["Susan Garlinghouse" <suendavid@worldnet.att.net>]

Hey guys, I need some input here.

I have a very nice coming-five-year-old Anglo-Arab gelding that is having
some problems, and I need to figure out the best course of action for him.
A brief background---I bred and raised him myself, he was *perfect*, would
do anything with total aplomb and absolute willingness.    This horse is not
an airhead.  I started him under saddle and he spent six months with a good
trainer in So Cal learning his basics.  And showed in a junior hunter under
saddle flat class where he took everything absolutely in stride, never
turned a hair.

When I moved up to Colorado to start vet school, I was way too gullible and
trusting and put him for 'training' in with someone I thought was a friend,
the now defunct Visions of the Wind business entity.  A long and fairly
horrifying story, but the short end of it was that nine months later, the
horse I rescued back was 200 lbs thinner, untrained or conditioned, his
floor-length tail had been chewed off from having been turned out with
strange horses willy-nilly, his tack was broken from his having been tied by
the bit and my perfectly behaved and brought up youngster's attitude was a
toal 180 degrees turnabout.  He was afraid of the shoer, startled and
anxious at every little thing, no longer tied without panicking, no longer
responds to the cues and leads he was taught, and from having shown
successfully at the Del Mar Nationals a year before, his appearance looked
like something the BLM would be ashamed asking a $100 adoption fee for.  Not
to mention that I was out thousands of dollars I'd paid up front, but the
bankruptcy courts let you get away with anything if you get weepy enough and
tell a good bedtime story.  But that's another issue.

The bottom line is that he's been with Karen Chaton since last August and
she's done a *terrific* job of working through the unspeakable abuse and
neglect that my horse went through.  His health is finally back where it
should be, he's back on track with his conditioning and most of the behavior
problems (shoeing, etc) have been taken care of.

The only remaining problem is that when Dakota origially came back form
this....person....he suddenly had alot of anxiety about being separated from
other horses, and the problem hasn't resolved with time.  He starts pacing
and calling, running up and down fences, working up a sweat, the whole
thing.  He'd never done that before.  We've given him some time and work to
let him get the idea that he's in a better place now, but he still seems to
be really anxious about being alone.  H's good out on the trail, alone or in
groups, but really gets upset when trailered out to strange places, big
strange groups and so on.

What are everybody else's experiences with working these problems through?
Karen is going to be tied up with XP this summer, so I have the options of
bringing him home and working with him myself (which wouldnt be consistent
because of my own schedule), or putting him with a back-to-basics
(professional and reputable) trainer who deals with behavior problems, or I
can put him with another endurance training center (also professional and
reputable, see, I've learned my lesson) that will keep up with the
conditioning, but doesn't necessarily directly address the anxiety issue,
and hope he works through it with time.

Any suggestions or input would be appreciated.

Susan G