I am interested in why in Surrey with so many gravel hills, you decided to go for unshod? In USA it was particularly in the mountains with stony ground that ranchers shod their horses. Ella is shod both front and back yet she makes her preference clear. She prefers the track to tarmac and on the track she prefers the grass verges to the sandy bit in the middle.
My previous long term hacking partners were shod front but not shod behind but that could have been because they may have kicked?
Barefoot has been proven to create a healthier functioning foot - which is why it can be such a powerful rehab tool.
I'm pro barefoot (but not anti shoes
) & do believe every horse could go barefoot with the correct diet, environment and workload but I do think that not every horse and owner has the time & facilities to make barefoot the right choice for them. But all things being equal, I'd certainly expect most leisure and working horses to be able cope barefootin the right set up.
Mindset, (lack of) education and social norms play a part too.
There are certainly risks associated with shoeing - I'd personally not choose to shoe a horse with metabolic issues for example, as it can hide a lot of the early warning signs.
I don't think you can judge what goes on in USA with the UK, fairly. Horse keeping and accepted norms are vastly different on the whole.
@Jane&Ziggy I'm really sorry if I've panicked you - from what you've said, you're a long way off a laminitis episode but I'm a firm believer that early intervention where possible also helps.
@carthorse There's gravel and there's gravel in short. Pea gravel can be really beneficial in transitioning to barefoot, rehab or maintenance but the gravel on our forest tracks for example, is likely to be harder for them as bigger size, possibly sharper etc. P is rock crunching over most at the moment - happily canters over them - but even he will pick his way over some of our very sharp gravel tracks in sections out hacking.
Same with tarmac - some are kinder than others - but as there's little give in the tarmac it can be problematic re: concussion, especially if the foot is vulnerable in any way. Often natural ground, although hard has a bit more give in it (although, perhaps not clay in a scorching summer ...!) . Equally, tarmac can be a brilliant surface for bare foot horses for helping to encourage wear so it's all swings and roundabouts.
Like anything, if you can condition the horse over a variety of surfaces I think you'll get a healthier horse - not just in their feet but all round in their bodies & minds too.
There's so many variables in hoof care its as much an art as a science, IME. ETA: I'm absolutely not a hoof expert though by any stretch of the imagination!