Join Date: Jan 2011
Location: North Dakota, USA
Why do you need the horse to be in the stall backwards? Why can't she be in there forward and back out when you have her tacked up? We have similar stalls where we tack our horses up and groom them. There is a hay manger in the front, so they go in forward and back out. The difference with ours it that the sides are made of wood.
All horses are claustrophobic, but some can deal with it better than others. That stall is pretty open where I wouldn't see that being the reason, but it could be. You could set up something that is close together and see if she'll walk thru it and get used to walking in tight spots.
It's hard to tell how much room you have to work with outside those stalls, but you need to show her that the stall is a place of rest, making her want to be in there. If there is enough room, I would make her do a lot of backing, yielding the front and back ends, then bring her to the stall to rest. I do the same to teach them to load in a trailer. If there isn't enough room, see if you can set up a mock stall outside or in an arena to work her by it. Another way you could try is to back her up, starting away from the stall. Have her back up past the stall but not go in. If she does that lead her away. If she balks or refuses, keep working her until she does it calmly, then take her away. Take her back to the stall and have her back until one hoof is in then take her away. Just keep working to get one more step in and take her away. When she takes the step you are looking for, praise her before taking her away.