My horse is really susceptible to colic (it's happened more than twice with no real reason why). What's happening and how can I help prevent it in the future?
get his teeth checked. Make sure there are no abnormalities/abscesses and make sure they are floated on time. Water is a big one too, if the water is too cold where you are they are less inclined to drink so make sure he has a salt block. If he does have a severe enough wave in his teeth or if he is missing teeth fk inhibit proper chewing/breakdown of the hay stems then go to soaking hay cubes in a generous amount of water instead of solid hay. Get him on probiotics and a gastrointestinal supplement.
How do I ask my tennessee walker to canter and can all tennessee walkers canter?
Yes they can :) there is a really cool standardbred called “bionic woman” who was a fantastic grand pre jumper. She just had a few quirks. I watched a Tennessee walker that was probably 15.2hh clean up a high jumpers class with style last year. There is generally just a thought that they would not be good at it. One of the old stigmas in the horse world that still hangs around.
Friesian/Gypsy Vanner/ long-haired breeds people: How do you keep forelocks thick and long for competition?
I would try adding flax oil or sho-glo or some other coat enhancing supplement to his diet. He might be missing some nutrients so his hair is falling out.
How can I make myself more aware of my equitation when I'm going over a jump? My brain just freezes sometimes and I don't know what I'm doing over the jump
Only try this on a low jump and with an adult/other person present but once your horse is set up and centered for the line close your eyes over the jump. It forces your brain to think about your movements to balance and move with the horse. I usually have my students close their eyes two strides before the jump when trying this exercise