I'm looking to buy a used horse trailer. We found a 14' stock trailer we really like but we are not sure if it will be big enough. I have a 14.2hh and a 15.3hh horse and the trailers inside height is 6'6". Will this be big enough? I know the width will be just fine I'm just worried about the height. I know years ago a 6' tall trailer was considered large, today it is small but will it still work OK?