BamBam is always active. The only reason he's ever in a stall is because there is a lot of stray dogs (mainly pits, nothing wrong with the breed.. I just don't want them around my minis). So when I'm not able to keep an eye on him, he's safe in his stall.
I heard going down hill is bad for the stifles? I only lead him up the hill. I have never lunged him, I don't do that with any young horse. Sometimes I take him for jogs down the road. I don't have a 4 wheeler or golf cart, that would definitely make it a lot easier. I have finally gotten him to trot over the poles a few times, but he still thinks it's fun to leap & play over them. He's your typical spoiled little boy that thinks everything is a game. 
I haven't seen him stay locked up in a long time, sometimes it's hard to even notice now.
I'll just keep working on him with hills & trotting over poles. He does seem a lot better & as it is right now im not as worried.
I said stifle lock, but his leg doesn't seem to stay locked anymore, it just sticks now occasionally? It's pretty confusing to explain really so maybe I'll try to video it sometime.
Going downhill won't hurt him unless you're doing extreme mountian climbing or something with him
but slight hills up and down in straight lines are great. By stalling I meant that there are some who are afraid that working the horse is worse for them and leave them up all the time with no turn out. Havign had my troubles with dogs, I can understadn keeping him safe. Jogging down the road is great, too. I had a 28 inch gelding that had both stifles affected and to keep him in shape, we jogged about 2 miles everyday. Got my butt in shape, too!
Thing of it is, you don't want it to stick at all, even if it is only occasionally now. You can't predict when and where it might happen and not addressing it now can lead to long term trouble as he gets older. The gelding I was telling you about came from a lady who did not bother to get him any kind of help. Funny thing was, she paid $10,000 for him, showed him a few times, and when she discovered his stifle isues were making him have trouble, she just tossed him out to pasture. Both of his were so severe that they would lock up and he'd be unable to move for long periods of time until they unlocked of their own accord. When I found him, both legs had locked and he was skin and bone from not being able to move much to graze. He had parked himself near the water- smart enough boy to do that, don't you think? and the area around him was a grazed down dirt pit. We hauled him straight away to the University vet clinic where they blistered both stifle joints by injecting them with betadine and causing the joints to "swell" into the bone groove and stay there. This horse was 8 yrs old when I got him, and in two years time of owning him, he started having bad trouble with arthritis where he had gone untreated for so long. It came down to us startign to make the desicion about how much should we make him deal with before we let him go, but sadly, he died of a brain anurysm at 12 yrs old.
I meant to say earlier too that your boy is certianly a handsome little dude!
