the mind > emotion > fear > fear of particular things > [noun] > fear of a gun
the world > animals > mammals > group Unguiculata or clawed mammal > family Canidae > dogs used for specific purposes > [noun] > sporting or hunting dog > gun shyness
1890 Oct. 427 Gunshyness [in dogs] is one of the worst difficulties with which sportsmen have to contend.
1960 C. Day Lewis v. 91 What caused this gun-shyness, I have no idea.