My grandson is a month old, he is on formula on beast milk, mother is pumping, baby would not take to breast, he has crying and pulling up of legs after eating, yesterday he was very fussy and hardly slept and slept for a few hours and was up all night not wanting to eat and crying, he had a bowel movement that was sticky and greenish, the formula is a gentle ease. we dont know how to help and feel helpless, do you have any ideas on how we could help him. Thanks