A pet pig allowed to live in a council house caused damage put at £15,000.
Derby Homes is trying to trace the tenant, who they believe recently removed the pig.
A spokeswoman said the 14-stone (89kg) animal could have been kept in the house on Kingsley Street in Sinfin for up to a year.
When council officials and the RSPCA went to evict the tenant on 15 March, they found muddied carpets covered in droppings and refuse on the floor.
The tenant removed the pig and therefore no action was taken by the RSPCA.
It is believed that the man also used to keep two Shetland ponies in his garden.
An eviction notice was sought following complaints from neighbours on Kingsley Road but the tenant has so far not been traced.
Derby Homes will be looking at their “vetting” procedures for future tennants.Follow @csabian
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