My sister and I were just talking about this the other day. We were remarking that humans are the only mammals who will push there young infants away from them, sleep away from them and ignore their cries.
: No other healhty mammal would ever do this to there young, it is dependent on their species to keep their infants close by.
When I worked in the infant room at a early childhood education centre I couldn't stand it when parents told me they were feberizing or using babywise. They used to tell us to ignore their babies cries when we put them down to nap and I would tell them that I could not do that. it went against our policy at the centre to respond to an infants needs. I went to many workshops that showed the effects of brain development in infants who were not responded to and would share this info with parents. I have spent many days at the centre with a newly transition infant in my arms or in a carrier most of the day.