@fussh
And not sure he just naps when tired maybe 2 naps in between feeds lasting 15 min to an hour
For context, I'd expect a 4 month old to be having about 3-5 hours of daytime sleep (and 10-12h at night). I'm a baby sleep consultant.
While all babies are different, an example routine for a 4 month old might be 2 hourly cycles of Wake > Feed > Short Nap:
7.00am Wake & Feed
8.15am Sleep
9.00am Wake & Feed
10.15am Sleep
11.00am Wake & Feed
12.15pm Sleep
1.00pm Wake & Feed
2.15pm Sleep
3.00pm Wake & Feed
4.15pm Sleep
5.00pm Wake & Feed
7.00pm Feed and Bed
6 feeds during the day (plus night feeds, if needed). 5 naps of 45 ish minutes = 3h 45
Another example would be fewer but longer daytime naps, for example:
7am Wake then Feed
9am Feed then Sleep
11am Wake then Feed
2pm Feed then Sleep
4pm Wake then Feed
6pm Feed
8pm Feed then Bed
This is 7 feeds a day and 4h of naps over two naps.
So it might be that when your baby is crying and you are assuming baby is crying because of hunger, infact baby is crying due to being very, very over tired and needing help to get to sleep.