To give a little bit of hope, my extremely sticky, very very green, new horse that would slam on the brakes after about two steps of trot then refuse to even walk again when I first got him about a month and a half ago, just did his first walk trot test yesterday at our in-house schooling show. It took some building up the trot bit by bit (go three steps then walk and praise, go five steps then walk and praise, etc), then once we could get up to half a circle or so I’d reward him if he gave a good transition, gave me a few steps of a more forward trot, or a few steps of a relaxed trot if he tensed up and put his head up and hollowed.
I’m quite relieved, this guy was a freebie and I was questioning if we’d get past this weirdness after the first week. But I basically had to decide, is he doing it out of stubbornness or out of insecurity and anxiety? In his case, he felt very insecure and would get nervous, and in his nervousness felt better stopping, so I really encouraged the slightest bit of try on his part and he started to relax more and more. If I had gone the other way and upped pressure to make him keep going, I think it would have backfired hard (actually I know it would have since that’s what the one that started him and ended up convincing me to take him did, she’s a great rider but can be a bit too intense for very sensitive ones). And now that he’s more confident, we are able to start upping the pressure a bit to get more forward and for longer. Canter is still a ways off, I want him more solid in his WT work and able to canter easily on the lunge on a large circle. But it IS possible, if there is nothing physical causing the stickiness.