So, a very strict routine and diet was put into place, and a lot of changes were made.
Although, for the next month it was consistent feeds, medication and a lot of rest. Which also meant that we were not attending some of our biggest competitions for the year. Finally, after a month we took him back to the vets, they said he was looking great and that his gained a lot of the large amount of weight he lost back. Which was excellent and he was able to slowly return to light work.
Right now, we're having a bit of a set back with him (which was expected) his lost some weight again and got a case of mild colic last night. Though, his alright and already this morning seemed a lot happier. Obviously, we're keeping a very close eye on him and letting the vet know what's going on.
I also have some photos, these are taken after he returned home from the vets (already, had he gained quite a bit of weight back). I need recent photos as well, the improvements look great!