A teenager on work experience at an RSPCA centre has been mauled by a Staffordshire bull terrier cross-breed.
Staffordshire bull terriers are not classed as dangerous dogs
Emily Scott, 16, suffered severe nose injuries in the attack by the dog at the centre in Preston, Lancashire.
The Myerscough College pupil, who is studying for a national diploma in animal care, was taken to Preston Royal Hospital and seen by a plastic surgeon.
The RSPCA said the dog was destroyed at the scene and an investigation is under way into the incident.
An RSPCA spokesman said: "Procedures are always put in place to safeguard staff and volunteers and we will now carry out a full investigation to see how this accident could have occurred.
"Our thoughts go out to the girl involved and her family at this time."
It is thought that Emily was cleaning out the dog's kennel when it attacked her.
Stuart Davidson, the marketing manager at Myerscough college, said: "It's obviously a tragic and upsetting incident.
"We have used the RSPCA and that centre for work placements for years and have done risk assessments and health and safety checks.
"We don't plan to send any more pupils to the centre while it's being investigated.
"We wish her all the best for her recovery and hope she can return to college soon."
The college has informed the Health and Safety Executive about the incident.
Staffordshire bull terriers are not one of the breeds subject to ownership or breeding restrictions under the Dangerous Dogs Act 1991.