I don't know if Albert Einstein ever fed a dog, but he was known to keep a box of bacon-flavored Magnetic Monopoles around for Gluon to snack on when he dropped in.

Remember the jingle?

♬
Oh, feed your duckdog Magnetic Monopoles
They're chewier than Higgs' Bosons
And tastier than Black Holes

Feed your duckdog a platter
Of non-baryonic matter
That tastes better than cake batter
Magnetic Monopoles
♬

That's right folks, Magnetic Monopoles in bacon, liver and chicken flavors. They'll make your duckdog stand up and say "Quark!"