They call it "pet grass" at the fancy market, and charge $3. The Finsters call it "mating aids" and consider it to be priceless. Some finches have mating dances that involve displaying sticks, pieces of grass, or any long thing that they can lift. I haven't seen my Society finches use grass during their Hunka Hunka Burning Love dances — after all, they're always singing at the same time — but it's pretty clear that this piece of grass makes Earl Grey look quite handsome. Don't you think?
Technically speaking, it's a small tub of sprouted wheat grass, and all the Finsters think it's pretty tasty. Even Frank and Sally reach up and grab a blade, bend it down, and chew on it.