DD is 4 and is in reception. Recently she had her vision, hearing, weight etc measured at school and yesterday I received a letter from the NHS saying that they are referring her to Morelife. Having googled it I'm mortified, I had no idea my child was that overweight! I checked the NHS site which measures their BMI and using the measurements they provided it shows DD being obese and on the 99th percentile 
Now I breastfed DD up until her 1st birthday and she was a big baby back then but over the years she's slimmed up if you know what I mean and to me she just doesn't look overweight. She has a healthy appetite and I am well aware of how to eat a healthy balanced diet etc but I do allow a treat for good behaviour. And DD is a very active, she would rather run than walk and I don't drive so she's used to walking places.
AIBU to be upset about this? What do I do? Ask the GP their opinion? It's made me doubt my abilities as a mother as I never even considered she could be obese.