Truely sorry to hear of your sad news, I guess it just won't of even had chance to sink yet (((hugs))), really hits home how easily a such a simple thing like having a loon around the field they can break something.
He was having fun doing what horses do and he sounds like he was a lucky lad having you. Really sorry and hope the happy memories soon shine through the real sadness you must be feeling now. x
I'm so sorry for you and speedy. I'm glad that you were with him and it sounds as if you had a great last ride.
Unfortunately I'm having to make a decision on Wednesday about having to put my boy to sleep and I know how I feel, so I know how much your heart is breaking.