Hunting ban protesters are calling on the culprit who threw offal into a minister's face to apologise.
The missile struck Mr Bradshaw on the face
Fisheries Minister and Exeter MP Ben Bradshaw suffered a cut below his eye in Exeter on Monday after a hollowed out apple filled with offal hit him.
The Countryside Alliance said it was a "great shame the actions of one idiot marred an otherwise peaceful protest against the hunting ban".
Police investigating the assault are examining film footage that was taken.
Devon and Cornwall Police said: "The offender was not identified at the scene but the assault has been recorded and enquiries undertaken to identify the offender."
About 70 demonstrators shouted abuse at Mr Bradshaw who was attending a fisheries meeting at County Hall in his Exeter constituency.