I don't think it is as much to do with is he part Shire or whatever...it is his whole basic conformation etc. that could be key. Some part Shires are very slim build and dainty on their feet - some are trundling great cobs with short thick set necks and backs, that with the best will in the world will struggle when you attain a certain level of schooling and demands on their athletic ability. As far as I am aware we have never been shown a full side on conformation or video of Ben so we only can judge by what you tell us, and that is rarely unbiased and helpful when asking for opinion.
I do speak with some small amount of experience here - Solly and some others I have had could learn to school and carry themselves in a very passable and impressive way of going - however there was always a point when their stature and build would go against them - they simply could NOT, with the best will in the world perform to any higher level - there is a point where they have given you their very best for what they are - and are priceless for doing that.
I am not for one moment saying this is what is happening with Ben, but could well be worth consideration as only you among us here truly know his type and capacity to go further than the point you are already at. On the other hand not one person could ever see my issue with Dolly a couple of years back when I felt she just wasn't right - intermittently and it did take a lot of investigation and referral to pin down that there actually was a physical issue going on......thankfully a relatively minor one but I ma grateful I did pick up on it when others swore she was 100 per cent sound - she wasn't. go with your gut instinct, it seldom lies to you when you have a close bond with your horse IMO.
I do speak with some small amount of experience here - Solly and some others I have had could learn to school and carry themselves in a very passable and impressive way of going - however there was always a point when their stature and build would go against them - they simply could NOT, with the best will in the world perform to any higher level - there is a point where they have given you their very best for what they are - and are priceless for doing that.
I am not for one moment saying this is what is happening with Ben, but could well be worth consideration as only you among us here truly know his type and capacity to go further than the point you are already at. On the other hand not one person could ever see my issue with Dolly a couple of years back when I felt she just wasn't right - intermittently and it did take a lot of investigation and referral to pin down that there actually was a physical issue going on......thankfully a relatively minor one but I ma grateful I did pick up on it when others swore she was 100 per cent sound - she wasn't. go with your gut instinct, it seldom lies to you when you have a close bond with your horse IMO.