As I got closer, I could see my neighbour's cows all staring horrified at a tiny brown horse... that was definitely not my horse!
I had brought a halter, lead, and a cup of senior horse kibbles, which I shook gently at the horse and he came running right up to me, and let me put the halter on while he gently nibbled delicious super-fatty senior horse kibbles. He easily allowed himself to be led into a pen, and looked hilariously tiny next to my neighbours enormous meat cattle.