Been thinking about this quite a bit over the past day or so, you lot are making me analyse past rides and what he generally does and what I do!
First off, Flipo has ickle legs - compared to a normal 15.2, his are shorter, probably more like the length of a 14hh because he has a sizeable deep girth being a heavy. He will never keep up with normal horses, I get that, his weight, height and general aerodynamics (or lack thereof) all contribute to him being suited to slow and steady and powerful.
We have had lameness and footiness in the past, and we had corrective shoeing for this which sorted it - checked out by the vet and yes he has a little bit of arthritis.
This is where I start to feel like LWTB and tango. I am constantly aware of Flipo being in any sort of pain and tbh, he's so perceptive, it's been suggested that he senses my concern and totally takes the pee. I wouldnt have agreed with this but I've done some soul searching and in certain scenarios, he will walk out absolutely fine. I wondered if the arthritis might be making him slow on the way out and by the time we head home, he's all loosened up, but....if I mount and turn towards the livery yard, Flipo will walk fine. If I mount and head in the other direction, he goes at absolute snails pace until our direction turns towards the yard or towards home. And I always do circular hacks.
With all of this in mind, I think I really do need to change my thinking. I worry he goes slow because there's a problem, but my rational side says there isn't one - it's all been checked out. Friend says he doesn't go forward and that's why he seems so uncomfortable and yes, I think I agree, when he strides out for the yard or on the way home, or when I take him into the show field to do some schooling, he's keen and moves his butt. I need to be more positive with my thinking as Flipo is very good at taking advantage. Eg if I'm the slightest bit nervous, he'll mess about at the block. He uses me to get out of work. He can be a bugger to lead if I'm not assertive and positive, he will plant outside his field, but if I think right and be firm, he does what I ask without question.
I can only think, that he needs another worm test, so will get that sorted, but otherwise healthwise, I feel like this has come about from me and my nerves holding him back and not wanting to go faster or indeed, hack at all.
I'm going to try the 8-10 steps of closing my legs around him and escalate to heel squeeze then whip. I also think more transitions earlier in my hack (but obviously after warming up) may help him move a bit more positively. We've been hill climbing more so that is encouraging his great big butt underneath him, and I can feel it when he does carry himself better but he's built for pulling so I will always acknowledge we're never going to be the perfect dressage team.
I'm concerned that I don't have the feel for when he's slowed down after I've asked.