Mine done it all the time lol sounded like my granny she was very healthy and alright just a grunter..now she is 11 months still grunts sometimes I call her granny grunt its comical
My baby girl does that! She's 3 weeks today. She not only does it after eating but in her sleep now to. We burp her regularly. I wish I knew why they do it, she's so loud at night idk how she sleeps through it!
That is normal. He more than likely needs to burp. Burp him and he will stop.