Most danger warning signs in newborn

Is your baby having trouble feeding, feed less or poorly? he may not open his mouth when offered the breast or she doesn't act hungry. if your baby stays alert and suckles the breast each time you try to feed her then you don't need to worry at all.. but if the baby sleeps almost all the time and can not empty the breastmilk then you try to wake her up to feed her but  she still don't feel like she is hungry at all...this is really a danger sign.
LESS ENERGY:
Babies always sleep a lot during the first week of their lives but as they grow they learn to wake up when they are hungry and they are always alert when awake but if the baby look sluggish and gloomy that means she have less energy. she sleeps more often than she used to and she dosent wake up more easily. try this to know if your baby is suffering from less energy
how you can help: clap your hands beside her ears, rub her foot. if the baby have less energy she will not react to these but when you try out those with a baby full of energy she will immideatly cry out or be startled to all those noices and stays awake longer but a baby with less energy may et startled but will sleep off immediately you stop what clapping or rubbing her feet.
ABNORMAL MOVEMENT: it might not be obvious but when you notice any feet or abnormal movement in the body.like, they way your  newborn stares in an empty space, when you notice the unusual shaking of her lips, tightening of feet or jerking of hands.

TEMPRETURE:compare your baby's tempr if her feet and stomach is cold it means that the baby is very cold and sick, warm  the baby by quickly place the baby on the mothers chest and cover her up. let her stay for at least an hour or till she warms up but if she still looks unwelll then that is a danger sign.