Doctors say they are now seeing children as young as six months old in their obesity clinics.
They are concerned some parents are supersizing meal portions for very young children and have lost sight of what "normal" weight looks like. They told the BBC that in extreme cases overfeeding a young child should be seen as a form of abuse or neglect.
A BBC investigation has learned obesity has been a factor in at least 20 child protection cases in the last year. The BBC contacted almost 50 consultant paediatricians around the UK to ask if they believe childhood obesity can ever be a child protection issue.
Dr Tabitha Randell, a consultant paediatrician from Nottingham, is one doctor who believes some parents are killing their children with kindness. In one extreme case Dr Randell saw a child aged two-and-a-half who weighed more than four stone (25.4 kg). Children of this age should weigh around two stone.
EDIT
http://news.bbc.co.uk/2/hi/health/6751991.stm