Sounds like, as with Trinity, Patty's another one that if she beats me to it, pretty much all I want to say is 'agree with the above'!
Such a pity about the feet not being marked for the rads.
Yes, absolutely this horse needs some protection/support under his feet. And toes backed up. I think Equipack is one possible good solution, but think it depends on environment & state of his feet with regard to infection, as to whether I'd want a 'fixed' sort of solution like that, or whether padded boots may be better, that you can remove daily to clean & dry.
When the bones inside the hoof sink and founder isnt the cause ,does the hoof take on the apreance of a foundered hoof?
It IS 'founder', regardless whether the bone 'sinks' &/or 'rotates' in relation to the capsule. On my definition, anything that inflames & damages the laminae is laminitis and there are a wide range of different specifics, such as mechanical changes. I think Patty is meaning laminitis as being necessarily metabolic/diet related(?) and 'founder' meaning the mechanical changes of sinking or rotation, which are common in conjunction/because of metabolic probs, but that's not the only cause.
Depending on what the mechanical changes are and depending what you call 'normal', what signs you recognise, the hooves may not look terrible, or typically chronically foundered.