Has anyone had a claustrophobic horse before and if so how did you manage to overcome loading them? My cob is 8 and will walk on to the trailer (after lots and lots of training) but the second you even think about closing the door she completely freaks, shakes and sweats uncontrollably and will run straight off. She was involved in a trailer accident before I owned her so she's got trauma but I'm not sure if this is ever something we will overcome. Does anyone have any experience with a situation like this?