Great advice. My horse is VERY anxious when he is left, weaves and paws when he's left in cross ties, very vocal when he sees other horses and *hates* being left behind by anyone- be it me or another horse just that leaves his sight (that he doesn't even know!). I have him on "Calm and Cool" and it's improving his moods A LOT!! Plus, his new barn only feeds him three way hay, which is a lot better than the alfalfa he was on back home. His diet has helped a lot... which makes sense. I am on anxiety medicine myself, and if I eat a lot of sugar or caffeine, I get *really crazy*! hahaha
But yeah, spend lots of time with him, too! Bali is always best when he's getting lots of attention. It's hard, because you want to just let them be social and happy, but it's important that they can be on their own and know they are going to be okay! Tonight Bali's pasture mate was being ridden and when the rider left Bali didn't want to go anymore... :-/ He's such a social little bugger.
Proud owner of 13yr old Paint Gelding, Bali! <3