I've been given something called Hydrophane Hoof Oil, I've seen a few people using this stuff so I'm hoping this will help. As for the calmness he was just him being lazy it turns out lol, he was fine yesterday.
Meant to add this but forgot
As for the laziness it definitely has to do with him being out with other horses now
When he was alone he had no one to talk or play with, now that he is with "friends" he now uses alot of his pint up energy for "horse playing" :)