Please mention age and weight. Is he passing urine and potty? Better to meet a pediatrician if not taking feeds. To rule out any illness..

If the baby is Full term then no need to admit in Nicu. Latching may be an issue See proper attachment too.

Newborns sometimes take some time to adjust to breast feeding. I do not know whether the baby is preterm or full term, but you need to start latching as much as possible , before you give top feeds/formula feeds. After top feeds baby will not take breast milk well till hungry enough for next feed And while latching, keep stimulating baby if falling asleep Good burping is the key to this, and after every feeds , 10-15 mins of keeping baby on shoulder needs to be done, regardless of whether baby is giving a burp or not.

See for any nose block and nosiy breathing because of that sometimes child may not Able latch

Visit physically to nearby pediatrician.

Check on 4 steps of correct latching available online and correct way of holding the baby

Might be latching issue , consult paediatrician for further evaluation.

Kindly consult once physically to nearby pediatrician

Nipple syringing That to be done for 5 min before each feed

How old is the baby. If the baby is term with no NICU requirements then latching will be the problem.

Age ?

Is the baby full term?? Need details about the baby's birth history