My son was just changed to elevate due to his milk protein allergy and bloody stools. He's been on elecare for 4 days and is also on rice cereal in his formula for reflux. He has seemed to be constipated so yesterday I gave him a suppository . it was dark green and yellow. And mixed with some mucous. He always acts uncomfortable and pushes like he's trying. To poop and can't. And is still very gassy. How is elecare bowel movements supposed to be? He is a 28 weeker. Now 39 weeks adjusted.