I understand how this can be worrying.

My DD recently had her 18mth check and she is in the 3rd %ile too at only 8.77kg. She will be lucky to reach 10kg by 2yrs I would say. She has always been around the 5th to 10th percentile but has had several colds, the flu and teething recently.

The child health nurse has got me giving her cream and lots of calorie adding foods. I was getting worried a while back and my friend who's dd was very small and had other issues had taken her to a paed. The info she passed onto me was that the paed doesnt worry if they child is 75% of the weight of the corresponding height.

What I mean is if she is in the 25% for height, look at what the 25% weight is and times by 75% on a calculator. I hope that makes sense. It put my mind at ease.

If you are worried get it looked into but I think it is a pretty common worry with toddlers who are busy!

Sazz