1) What do I do about his rearing? It is a total lack of respect and it could become a dangerous habit. Would lungeing with a whip be more effective?
I think lunging with a whip or NH stick would be helpful in dealing with the rearing. When he pops up (or even starts acting like he'd rather do something other than go forward), raise the hand holding the line high and "point" in the direction that you want him to go, and spin the whip toward his shoulder to drive his front end away while it's up. When he comes down, keep twirling the whip behind his withers to drive him onto his circle. I'd ignore the fact that it is
a rear, and otherwise treat it like any other evasion of an aid: keep asking correctly until he gives the right answer. To me, if he feels like evading up, more power to him, as long as he's doing it at the other end of the rope. It's no different than the horse who won't circle, or faces up instead of going forward. The whip lets you get in and cue without getting close enough to be in danger. 2) What should I do about this lady? Should I catch her in the act and then report it to the lady who owns the property?
I'd just keep my eyes open. There's not much you can do without concrete proof of what is happening. Maybe you could use the spy-movie trick and stick a piece of tape on the gate latch of his paddock and stall while he's in there, and if it's come loose you know it's tampered with (jk
). Seriously, maybe ask the BO if she's seen anything out of the ordinary. Someone else can probably field this one better than me... I don't have a lot of experience dealing with boarding barn drama. 3)And his fear of being tieing up, I believe it stems from her! How should I teach him to tie properly?
I personally like the Blocker tie rings, but I know they're not for everyone, and I may get plasted for suggesting it. Clinton Anderson did a really good demo on his tv show on how and why the rig helps with green and problem tie-ers. 4) What are some techniques I could use if he rears and I don't have a lunge whip?
Keep the tail of your line in your rump-side hand, ready to drive the front end away, and then the back end forward, just like the whip. Not ideal, but if you're in a bind it can do the same job. If you anticipate needing to use the rope a lot, I advise practicing some first. There is some potential to get tangled up.
Hope that was helpful to you. Good luck!