dont think so coz he used to eat more often then wot he does. now how much does a month old normally eat?
would he be eating little and often? he may be in the habit of eating like this. your doctor may be best to advise you what to do xo
If he seems fine and his weight keeps going up you shouldn't have to worry about it. Babies have big growth spurts where they eat tons and then taper off a bit.