He's an absolute superstar. He's always had a bit of a sore back and has had regular physio which has kept him well, plus regular saddle checks. He's been kept in a lot this winter as our fields flooded. Anyway, he has got grumpier and grumpier - he's always been defensive over food but now he will go to bite you if you try to pat him over the stable door. Even Dd3 who he adores.
physio came yesterday and said his back super sore (he was kicking out, completely out of character). I've turned him out and we are not riding him until physio has been again next week.
He is an extremely good doer, is fed hay or haylage, a balancer (actually changed this from baileys lo-cal to top spec cool a few months ago) and the odd handful of pony nuts.
I'm quite worried about him.