This must be bugged again because I also got the "baby hasn't been fed in awhile feed it soon or we will take it" notice - but not only was the baby's icon green and no crying, literally a few sim minutes prior I watched the nanny give the baby a bottle. My sim was doing something else so I was just following the nanny around with the camera and happened to see this. Seriously ? I just WATCHED the nanny feed the kid! Hope this gets addressed soon, the part of the point of nanny NPCs is so that babies are cared for!