Green’s Dictionary of Slang

dog’s eye n.

[rhy. sl.]

(Aus.) a meat pie.

[Aus]Bulletin issues 5626-33 105/2: We gave our first lesson on dinki-di slang [...] Dog’s eye: Pie, with or without dead horse.
[Aus]G. Seal Lingo 88: a dog’s eye and dead horse. A pie and sauce, of course [...] rhyming slang for this peculiarly Australian repast.