I loved hearing all the news about him on the old Stabletalk forum, from when Michelle successfully showed him, to when he went out on loan and then came back again.
He was a stunning chap, and I know much loved, so you both must be devastated. Treasure all those memories and the lovely pics you took.
I am so sorry to hear the sad news. Do not live feeling guilty, u obviously gave him the greatest life, he looks a Very happy horse who had a super time with you. I hope you and your sister are getting lots of support and hugs and that time slowly may heal things a little bit. x