Pig rooting or bucking into a canter (assuming the horse is sound) mostly is caused by a persons inability to let the horse go. ... Some horses will refuse to canter and just trot faster and faster through fear of this and others will pigroot or in worse cases buck as they transition.

What does it mean when a horse Pigroot?

(of a horse or other animal) kick upwards with the hind legs, keeping the head down and the forelegs firmly planted. 'Unfortunately when I got him into a canter all he wanted to do was drop his head and pig root and buck.

How do I stop my horse from rooting?

The trick to dealing with rooting is not to pull back on the reins, but to ask the horse to keep moving forward. As soon as you see the horse starting to put its head down to root, push it forward with your seat and leg aids.