Birthweight of my baby boy was 2.75kgs and he now weighs 4.96kgs at 2 and half months. He was born on July 13th 2015 and has only breastmilk also his feeding time is hardly 15 mins on one side every 2 hrs during day and 15 mins every 4 hrs during night. Is his weight gain goin good as per his age? and is his feeding time too less for his age because I read that other children feed for longer time?