Did they do an x-ray/sonogram of her abdomen to confirm that nothing physical with her digestive system is going on? My daughter went through this same thing at roughly the same age as your daughter. Although my three boys never suffered constipation, I learned it is very common at this age, particularly with girls. I would not suggest the enemas, traditional laxatives or fiber increasing agents; although if you do use these, keep in mind that if you don't GREATLY increase your daughter's water intake, many of these will have the reverse affect on her issue, compounding the constipation and actually making it worse. How persistent were you with Miralax? It took a few days with my daughter, but this is what eventually worked for her. She took this for quite some time, until she and her body decided to have regular bowel movements without the aid. Miralax is not a traditional laxative, so you don't need to worry about her body developing a dependency for it. In short, I would recommend insisting on the x-ray. At this point, your daughter could simply have a blockage, in which case, if that is cleared up then you persist with Miralax, her problem may be solved. Or I would be inclined, like the other Moms to think she could possibly be having a food allergy if the constipation persists with consistent and proper dosage of the Miralax. Hope this helps, and praying your sweet baby improves soon....