A white rhino thought by keepers to be on the small side and sickly when born in March has fought his way back to full health.
The 55th white rhino born at Whipsnade Zoo in Bedfordshire since 1970 now weighs in at about 100kg (220lbs).
His mother Clara has fed the six-week-old since he was born and he has rapidly put on weight.
They made a first official appearance together this week but the baby calf has still to be named, the zoo said.
BBC News 30 April 2008