In November, I bought a 10 year old Haflinger to use strictly as a trail horse. And he’s fabulous on trails. Before I got him, he was broke to drive so glad and double, and went on multiple two week elk hunting trips where he was ridden and used to pack. He canters on a lunge line, he canters in pasture, but not under saddle. I’m thinking that he may not have had much, if any, experience centering under saddle which is why he doesn’t seem to know what I’m asking. When the arena dries, I thought I’d lunge him with a saddle and try after that to get him to canter while I’m on him.
Honestly, since all we do is trail ride, being able to canter isn’t terribly important. Even on the steep, rocky hills he trots rather than canter. But it is fun to canter, and if my situation would change and I’d need to sell him, I’d want him to have a good canter rather than just trotting faster and faster.