I'm so sorry.. he looks to have been an incredibly handsome horse and I have no doubts that he meant the world to you, hopefully the rest of the herd perks up within the coming while.
My uncle used to breed Quarter Horses and he had a cremello stallion that he had raised from birth.. my grandparents had owned a convenience store and he would even walk him around in there as a foal. Like your handsome boy, DJ (the four year old stallion) also ended up breaking his leg.. my uncle ended up having to shoot him himself because the vet wasn't available. My mom said it was the first and only time she ever saw him cry.
Again, I'm so sorry for your loss.. normally I'm not a huge fan of Arabians, but he looks absolutely gorgeous.