hey katie! the word we use 2 get them 2 change directions is reverse and i just walk a couple strides ahead of her instead of the usual following behind the girth or hind end... then say reverse or just move that way and if he tries 2 pass u then be stern and get in front of him &make him go the opposite direction just so he'll know that's wat ur asking. it'll be a little different at first, even if he has learned it b4 and hasn't done it 4 a while...lucy gets like that if i dont lunge for a while.
the canter thing..it depends on the size of the round pen or he could just be trying 2 stay out of the canter like my horse sometimes does, just lazy or maybe a little unbalanced at it..remember, they get frustrated just like we do! lol. what i did to train her was every command you say in a different tone of voice & a dif way (if u want 2 voice train 2) like walk is "waaaallllkkk" drawn out 2 get them 2 slow down, trot is "tur-rot" in a more happy tone.. say his name, then say trot, try trot again n a more stern voice, and then trot w/ whip added, give him a chance b4 u get the whip after him &u'd be suprised how soon they learn the words.. same way with canter, i say it "caaann-TUR" & i usually have 2 use the whip on this..lol. then i stay with her to keep her going and use clicking sounds and whip if necessary....dont 4get 2 add good boy and praise him! :) to get him 2 walk, say walk and stop where u are so he knows its ok for him to slow down... pretend there is an air bubble between u and ur pushing it at him by followin him 2 make him faster and when u stop the pressure is released and he can slow. if he stops click and say walk, just spend A LOT A LOT of time doing the basics then start adding ground poles, then x's.. it takes a while for them to get used to it and u want him to listen 2 u first b4 he's worried about what he's stepping over or tryin 2 go around...lol.
srry it's so long but it woulda taken me 4ever 2 tell ya all this tomorrow...haha
just let me kno if u have any ?'s
*~*Very Much In Love*~*