Burping

Kathleen

First time mom here. My one month old gets a lot of gas after he feeds from his bottle. He is tongue tied so I have to pump, and he alternates between breast and formula. [ I don’t make enough milk]. feel like I’m hurting him smacking him on the back to get him to burp, and it seems so hard to get him to do it. is there any more modern gentler way to get babies to burp?