The nursery team switches him every few days with his sister so that while one is being bottle-fed, the other is with mum—she never suspects.

护理团队每隔几天就会把他和他的妹妹调换一次，这样，当一个宝宝被奶瓶喂养时，另一个宝宝就和妈妈在一起了——她从来没有怀疑过。

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Were her children breast-fed or bottle-fed ?

她的孩子喂的是人奶还是牛奶？

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But even if bottle-fed babies are sleeping longer, their moms are not, say the researchers.

但是，研究者们说，即便配方奶喂养的宝宝能睡得时间长一些，他们的妈妈则不然。

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Zoo employees Jerry and Cindy Stones the baby was named Gladys Stones on Friday bottle-fed and cared for her there.

NPR: Grunting Ohio Zoo Workers Act As Moms To Gorilla

Born last December, the bear ignited a heated debate about hand-rearing after his mother rejected him and he was brought up and bottle-fed by Mr Doerflein.

BBC: Polar bear cub Knut was defiant in the face of death threats

And in families where one child was breastfed while a sibling was bottle-fed, there was still a difference in their chances of social mobility, with the breastfed child 16% more likely to move up in class.

BBC: The study looked at the long-term effect of breastfeeding