Newborn Sleeping during feedings

Kay • Baby Boy mom 12.2018💙👶🏽

I’m exclusively breastfeeding my baby and he’s 2 weeks old. He’s lost two ounces which has made his doctor concerned. When he feeds, he instantly falls asleep. I’ve tried to tickle his feet, hold his hands and other little things. Has anyone experienced this? What did you do to keep your newborn awake during feedings? I’m certain that this is what has caused him to lose weight