Doctors said to be concerned about her weight loss

Nicole Richie has been ordered to switch her daughter to bottle feeding – because the The Simple Life star is losing too much weight.

Doctors are said to be concerned that she’s become too skinny since giving birth to Harlow Winter, 6 months, reports the Daily Star.

Breastfeeding burns vast amounts of calories and it seems it’s been taking its toll on tiny Nicole.

Nicole, 26, gave birth in January with fiancé Joel Madden, 29, by her side.