Congratulations on your precious new baby!
Did you switch her food all at once? That might be the problem. Their food needs to be switched gradually over at least a week, or they could get an upset tummy.
Green beans have a good amount of fiber so you might try giving her those. I give mine frozen green beans straight out of the freezer - they love 'em. Only give a couple of one inch pieces at a time though, or she'll be having the opposite problem.
Good luck!

Bonny
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He is your friend, your partner, your defender, your dog. You are his life, his love, his leader. He will be yours, faithful and true, to the last beat of his heart. You owe it to him to be worthy of such devotion. -- Author Unknown