A two-year-old girl suffered serious injuries when she was bitten in the face by a dog.
The toddler was playing in a field off Yates Street in Leigh, Greater Manchester, when she went to stroke the Staffordshire bull terrier.
Her father saw the dog bite her and rushed to help, but the dog's owner was not found.
The girl was treated for a puncture to her cheek, bruising to her jaw and tongue and other cuts to her face.
She spent three days at Liverpool Children's Hospital following the attack, which happened on 13 May at about 1330 BST.
Greater Manchester Police are now urging the owner of the white dog to come forward.
Pc Deby Johnson, from the Wigan Public Service Team, said: "This little girl has innocently gone to stroke a dog that has turned on her, causing some very nasty injuries.
"The girl's father's main concern was obviously his daughter, so he was not able to see whether the dog's owner was about or where it ran off to."
She added: "Does this sound like your dog? Perhaps you weren't aware of what happened or did not realise the extent of the injuries suffered and I am keen to speak to you."