For one thing, I'd get her on some probiotics, a little each day for a week and see if that helps this. We use Hydro-Hen which is electrolytes and probiotics, but Greek yogurt is very high in probiotics. We ferment grains here so a couple of times a week they get that, which is full of probiotics/prebiotics.
This may or may not resolve the issue but I'd try it as it won't hurt and might help. Also, I'd read up on those articles that @alinas2010 posted as those are the top two best articles about crop issues anywhere!
