Originally Posted by tb2008
she does not seem to be bothered by it when I ride her but
I'd wonder about that. In the picture she looks like she is favouring her right front. If that is the case, then it is bothering her and definitely would be an issue when being ridden. Maybe you haven't noticed because you think it's her "normal" gait.
Does the swelling ever change? Check it at different times of the day if you can and see.