Hi! The problem with a hernia, is the muscle in the abdomen stretches, tears and drops. If she had surgery from impacted colic, then she is really lucky to be alive. That is so hard to tell because I can not see it. I can't see where it actually is. And I don't know her age or breed. How do you work her? Give me more details and let me see if I can figure something out. Please be very specific.