My grandson has been on elecare for 6weeks. there is still mucus in his stools. should we switch to neocate to see if that will help. pediatrican is no help. says she knows nothing about it?

Get a referral: You should go see an allergist or a gastroenterologist, or perhaps both. Hard to really give a good answer to this without seeing the patient and getting a lot more history.

Formula changes: What is your grandson's underlying GI problem and why the concern about mucous in his stools. Is there also blood, poor weight gain/growth, vomiting, irritability, poor feeding. All of these things come in to play when deciding on formula changes and needs. If he is felt to have multiple food allergies, he needs to be consulting with BOTH peds GI and peds ALLERGY. In meantime suggest Nutramigen.