Scarborough's depressed penguins now 'quite happy'
Penguins given anti-depressants after a break-in left them stressed have gone on to make a full recovery.
A trespasser broke into their enclosure at Scarborough's Sea Life Centre and chased them in April 2011.
Staff at the centre said the birds had been left "frightened" following the incident and needed medication.
The birds have recovered and two couples have produced eggs which are due to hatch later this year, curators at the centre said.