dog biscuit

a hard biscuit for dogs, usually containing ground meat, bones, etc.

Military. a hard dry biscuit used as an emergency ration.

Origin of dog biscuit

First recorded in 1855–60

It began at breakfast; I didn't like the meat and sniffed disdainfully at my dog-biscuit.

Barks and Purrs |Colette Willy, aka Colette
Bread-and-milk or fruit or soft-boiled egg or dog-biscuit or ants'-eggs.

Indiscretions of Archie |P. G. Wodehouse
They were a species of flat gluten cake rather like a dog-biscuit, but much harder.

Pan-Islam |George Wyman Bury
First he went to the wagon-shed, and there, because it was near the three kennels, was kept the box of dog-biscuit.

Half-Past Seven Stories |Robert Gordon Anderson

They're bein' fed on iron-filin's an' dog-biscuit these days, but glory's no compensation for a belly-ache.

Soldier Stories |Rudyard Kipling

dog biscuit

a hard biscuit for dogs