I have an 8 day old baby and today when he was weighed he had lost a tiny amount of weight since he was last weighed at 5 days. For medical reasons I am having to bottle feed my son, and our midwife has said the weight loss could be because we are using the Tommee Tippee closer to nature bottles. He’s feeding well and taking in a good amount of formula, but apparently the teats on these bottles can make it hard for the baby to get formula and he could be using more calories trying to drink the formula than he is gaining from the formula itself. My problem is which bottle or teat should I use? The midwife showed me an example of a good teat to use which was the Medela bottle, but I’ve read that this is designed for breast feeding babies which mine isn’t. I’ve tried using Nuk first choice tonight but he hasn’t done too well with this one. Has anyone else had this issue? Can anyone recommend a good bottle or teat that is easy for the baby to get formula from? Apart from the minor weight loss he’s a healthy baby and the midwives have no other concerns