My dd, (who is my third), is 19 weeks old and has just fallen off those lines on the chart. She is exclusively breast fed, born at 7lbs 14 oz, and now weighs 10lbs 5oz. I would like to hear from anyone whose baby has fallen off the chart. Should I give a bottle? Will it make a difference? She was following just above the 0.4th percentile line and she has had 2 colds in the last month which could cause the lack of weight gain. What happens if she is referred to a pediatrician? I have to say that she is happy, and doing all one might expect for her age. She seems to feed well, and poos and wees etc. Please help me as it is making me very miserable and sad. (I should point out that I exclusively breastfed my dd2 for 14 months. My ds1 I switched to bottles at 11 weeks because his weight gain was slow- although he didn't gain any more and continued on the 25th percentile.)