A 67-year-old man was walking his dog in Regal Way when two unaccompanied dogs approached on September 26.
The larger of the two dogs began to attack the man’s dog and so he lifted it up.
The dog then bit the man’s arm and stomach, before both the dogs ran off towards Woodcock Park.
The man was treated in hospital for his injuries.
Officers have released images of the dogs.
They are keen to trace the owners to speak to them following the incident.
Anyone who can help should call or tweet 101 ref CAD 6264/26 Sept.
Information can be given anonymously to the independent Crimestoppers on 0800 555 111 or at crimestoppers-uk.org.