Magic did not seem her usual self this morning. She came in gassy again last night but has plenty poos in stable and eaten all her hay so I would rule out colic. She seemed abit tucked up and when I put the saddle on and tightened her girth she started to collapse! Undid it very quickly and took saddle off. No sign of pain along her back so I lunged her steadily in walk and trot and she seemed fine. No abnormal behaviour. One thing she did do as I got in arena is have a wee. Would busting for a wee make her uncomfortable with girth? Decided to turn her out as I had ruled out colic and any footiness. Galloped up field. Sorry it's so long but it scared me to death. Any thoughts please as I daren't try to put saddle on again.