I have talked to two vets now that went through the same questions with me and gave the same answer.
1. Q: Is he eating
A: Yes... now he is. He always acted like he wasn't hungry for the first few weeks.
2. Q: how's his stool
A: perfectly normal
3: Q: Has he had any changes recently in home, companions or human interaction?
A: Yes, he has moved from the home where he lived for 15 years after enduring drought and harsh conditions from weather. He has lost his parents, his grandkids and his little buddy Molly the Shetland. He's in a new home with lots of horses and new people. He's being ridden daily after not riding for three years and on strange new terrain.
At that point, both vets stopped me. Both said roughly the same thing but one's answer was so down to earth I thought I would share it.
He said, what if you lost your mom and dad and brothers and sister in the same day? What if on that day you were taken to a strange place and kept with lots of new people you have never met, some bite, some are friendly but all are foreign to you. Now add that it's about 3,000 feet above sea level from where you were... and then ad that some one is getting on your back and making you walk for miles EVERY DAY!
Would you be losing weight?
He said that emotional disruption causes weight changes in people AND animals and that changing his food would only add to the the changes he's already enduring. He told me that as long as he's eating and has been wormed and such, I should give him a little time to get his bearings.
He's right, he is looking much better this week. And he's acting hungry again. We have him on a round bale around the clock and he's pigging out and acting like a young horse. He's getting his spunk back.
I am asking the people who are adopting him and his buddy to come over a couple of times and let him get to know them before we move him. He is being adopted WITH his buddy of 13 years. That WILL help!
I think he's going to be JUST FINE.
Thanks to everyone who added their help and suggestions.