A pig caused up to £15,000 of damage to a council house after his owner let the animal live in the property for a year.
The Gloucester Old Spot was roaming around the bottom floor of the property in Kingsley Street, Sinfin, Derbyshire, when housing staff from Derby County Council went to evict the tenant following complaints from neighbours.
The carpets were muddied and covered in droppings, and rooms were so full of boxes of junk that officials could not get into them.
Derby Homes, which is responsible for managing council houses in the city, said the cost of repairing the damage caused to the property would be thousands of pounds.
When housing officials and the RSPCA turned up to evict the tenant on March 15 after gaining an eviction notice from court, the tenant took the pig away.
Council officials are now trying to trace his whereabouts.
Maria Murphy, director of housing and customer service at Derby Homes, said: "This is a disgraceful waste of money, caused by a tenant who failed to show respect for this property or his tenancy agreement.
"On top of the repair costs there is the cost of the office time and legal proceedings in gaining possession of this property."
"The tenant removed the pig and therefore no action was taken by the RSPCA.
"We are trying to trace the whereabouts of the tenant and will pursue the costs of repairs required at the property.
"The individual will not be eligible for housing with Derby Homes in the future."