Hungrier babies cow and gate milk

My baby is now 3+1 day old when can I put her on the hungrier babies milk can I put her on it now ??as she falls asslep while drinking her milk and when I try put her down she starts crying again for more milk then I'll pick her up try give her milk and she will suck on it for about 3 mins and do the same thing so I have 2 boxes of hungrier baby's milk and I don't know if it's fine if I try it out I guess it's thicker but could it hurt my baby in any wAy