Oo, normal lang yan sa newborns, lalo na pag gutom or uncomfortable sila! Ang parang hilik-hilik sound na yan ay paraan nila ng pag-communicate since hindi pa nila kaya mag-cry ng malinaw, kaya minsan parang humahango lang sila or nag-whimper, especially pag pagod na pagod or need ng latch. One of my mum friends thought something was wrong din with hers, pero the pedia assured her it's just baby's way of settling or calling out, normal lang talaga. Pero kung worried ka talaga or may unusual breathing sounds pa, better check with the pedia just to be sure para sa peace of mind mo.