A stray dog bit a woman on the wrist and shin when she tried to stop it attacking her own dog.
The Staffordshire bull terrier turned on the woman and her spaniel in Melton last Thursday.
Police said the Staffordshire initially bit the spaniel and then turned on the woman when she tried to protect her pet.
The incident happened between Blenheim Walk and Drummond Walk at 8am.
The stray is black with white paws and a white chest. It was wearing a brown leather collar.
The victim has told police she did not see its owner.
Police community support officer Claire Gilbert, of Melton police station, said today: "We would really like to find the owner of this dog so that we can put measures in place to stop this happening again.
"We would therefore like to hear from anyone who knows who this dog belongs to."
