scary moment

I am farly new to horses (at least as an adult). But I had something happen yesterday that I have never heard of. I was getting my wifes horse ready for a ride. After everything was done I went to check her saddle and all at once the horse passed out. Scared the daylights out of us. I pulled the saddle and braddle off her and she lust laid there for about a minute. Then she jumped up like nothing had happen. We walked her around a bit and she really wanted to go play with everybody else so we put the tac back on her and rode all day with no problems.

Anybody know what could have caused this? She hasn't been rode much lately and is a little chubby but I don't think that had anything to do with it. She is very loving and we have never had any problems out of her.

Someone told me I might have put the saddle on to tight or even her head stall was to tight....anybody have any sugestions?

I've always been told you can't do a girth tight enough to hurt the horse, it would just make it more difficult to breathe. I guess it's possible it caused her to have problems breathing..

I don't believe it would have been the halter unless it was sizes too small and super tight, and you should have noticed that.

Was it a hot day? Was the horse left standing in the heat? :/

I thought I read something on here a little bit ago about a nerve that the girth can pinch which can cause a horse to faint.

Not hot at all, about 80 degrees and she was standing in the shade.

Does She Have Narcolepsy? The Condition Were The Horse Just Falls Asleep And Then Few Minutes Gets Up As If Nothings Happend? I Was Reading About It The Other Day.

Narcolepsy...not sure but she has never done this before. However, if she fell asleep wouldn't she just stand there a sleep and not fall over.

I have heard from many different trainers this is a common thing when a horse gets scared. Some back up some fight some just fall over paralyzed. I read this and cross referenced it many times all to come back to the same answer.

No In Narcoleptic Horses When They Have An 'Attack' They Fall To The Ground
Understanding narcolepsy - Horses for sale, Equestrian news - Horse & Hound

Narcolepsy (sudden falling asleep!!) - New Rider Message Board

You should have your mare evaluated by a vet. There are a few conditions that could cause this and it is critical that you have it diagnosed. We had a woman come in with her horse who had been pinned underneath her, luckily she had someone there to pull her out. Another mare that came in fell on her owner's child. This is extremely dangerous and you need to know if it is going to happen again. Tightening the girth could not have caused it, nor could an overly tight headstall as she would have struggled or been distressed, not just dropped over without warning.