Y does my horse always trip?

Brief：
I have a 24 year old morab and when I ride her she is always tripping. She has been shod lately and there is nothing health wise wrong with her. So I .. 

I have a 24 year old morab and when I ride her she is always tripping. She has been shod lately and there is nothing health wise wrong with her. So I am starting to get worried, I realize that if the rider is not balanced the horse can trip, but according to our trainer we are balanced. She seems to do it more when we are going at a walk then when we are at any other speed. So I was wondering if it could be because she doesn't pay as much attention to where she is going at a walk?

Any help would be appreciated.

Sometimes a very well trained / schooled horse with an in experienced or un balanced rider on it will get mixed messages from the rider. I remember when I wasnt so good a riding when I would trot my horse he would trip / stumble regularly. I was told by my uncle after he observerd me riding for a while that I was sending the animal different messages with my hands than my legs. Im not saying that this is the same problem for you but it might be. P.S. my uncle was champion jockey and a trainer for years, so he knew what he was talking about.

Check your horses conformation, is it correct. Do any legs turn slightly in..??

His it over reaching with its hind legs..??

Have you a good farrier / blacksmith..??

Hope this helps a bit.. not sure ! sounds as if you need to contact your horse's Vet asap...to make sure! You need to see a vet.

I can't remember, but there is something that causes tripping.