One thing that I have noticed with newer horse owners, (and some older ones too) is that they adopt a tone of worry in their voices when reassuring their horses. Instead of saying, in a calm and firm tone, "get up there, and quit that" they say in a high pitched concerned tone, "it's all right, don't be scared" which does nothing to reassure the horse. Same thing people do to babies for that matter. If you constantly put a worry tone in your voice, then the horse feels there is something to worry about. Not saying in this case that is going on, but it is something to consider. After all, would you rather follow a confident leader into a battle, or one that is passing out the pacifiers and blankies?
since my trustworthy mount of 10 yrs passed away 2 years ago, i have been on a "finding the right horse" mission. the arabian i have now is the 3rd horse to be in the lineup and he's been here for only 5 months. when i got him i was told he had tons of trail miles in the mountains. so i thought ok, he's a pro, been there done that. nope. i could tell a big difference in him when we are near houses and when we are in the woods. calmer in the woods for sure, than around stuff. at this moment i have to ride on a single lane blacktop road to get to trails. that means passing cars, houses, dogs, mailboxes, trash containers, etc. the first ride i took him on after bringing him home, a dog came running up behind us on the trail, and he panicked and dumped me. (i was in a group) first time i'd hit the dirt in 8 yrs! ouch! the next 3 rides after that he almost dumped me each time freaking over anything that moved and made noise! just the wind blowing dead weeds made him panic. so, more ground work started. i now have a plastic grocery bag on a stick, that ive been desensitizing him with. he's doing so much better with it now. i hung up a black garbage bag to flop and whip in the wind near his hay feeder. i now have 2 flags, 1 in my barn, 1 over the water trough outside. plus i took a clear plastic garbage bag and cut it into strips and hung it over the doorway, and if he wants in or out of the barn he has to go thru it, and he has. let me just say, what a world of difference those things have made!!! clinton anderson says, give your horse a heart attack every day! yes it looks crazy at my barn, but after all these noisy scary things have been around him on a daily basis he isnt as jumpy as he was. plus i just know our relationship is heading in the right direction now. up! i finally took him on a ride not to long ago, up the road, and onto the trail for over an hour! he was hesitant in a few spots, but nothing like he was before. he was more confident, and i was more confident. i really like this horse and think we can have a good future together. if he keeps his confidence and courage up, i have faith he will, we are going to make a great team!! good luck to you!
I loved all of your suggestions about a nervous horse. I would like to add one more that has worked wonders with my nervous gelding. I always had the sense that he wasn't being disobedient but just got 'stupid' and quit thinking. His head got high and his neck was tense. After a spook he would do a bone jarring 'jig' for the remainder of the ride. I put him on a daily calming supplement and within a few weeks he started dropping his head and thinking through things that made him nervous (like a creek reflecting sunlight). He still spooks on occasion (what horse doesn't) but they are milder and he calms back down quickly.