Babies are piling on the pounds because their mothers are watching television while feeding them, researchers fear.
They say that the 'technology trap' may be distracting new mothers and stopping them from noticing when their children have had enough milk.
Having one eye on the television or texting on their phones while feeding could also be making it harder for mother and child to bond.
The US researchers said that just as TV dinners led adults to eat without thinking, mothers may be guilty of 'mindless feeding'.
With obesity cutting up to nine years off life, experts say today's youngsters could be the first generation to die at an earlier age than their parents.