New mum worrying

[Starfish25]

My LO is over 6 weeks old and for the past two days now he doesn't seem to be taking his bottles that much he recently went on to 5oz but at the moment he is taking between 1 to 3oz then falling asleep and refusing the rest of the bottle. To me he is his normal self smiling away, chatting but him not drinking like normal makes me panic or am I being silly?

Is he having the same amount overall - so more bottles but less in each bottle.

Does he have lots of wet and dirty nappies?

It may be a growth spurt so lots of sleeping.

From what I remember they go trough their biggest growth spurt at 6-7 weeks and some babies tempt to sleep more, mine used to be more unsettled and eat mite often, or just suck for comfort but shebwas bf