6 m/o eating less

Hey everyone,

My LB is almost 6 months and his feeding has changed over this past few days. He used to eat 7-8oz every 3 hours - now he’s only having 2-4 ounces every 2 hours - he is still sleeping 11 hours at night and day time naps, still got plenty of wet and dirty nappies, no temperature, still laughing and smiling and alert. (Although he is a baby that doesn’t like to be messed or fussed with and gets easily agitated!)

Do you have any idea what it could be? Would you go to a doctor if it carried on and if so, for how long?

Thanks in advance!