When a goat eats grass what form of energy passes directly from the grass to the goat?

The energy transfered is in the form of chemical energy. The biomass of the grass is transferred to the goat in the form of chemical bonds. The enzymes within the goat's stomach break down the grass cellulose into simple usuable sugars. On average, only about 10% of the grass consumed is actually converted to the useable chemical energy. The rest is turned to biological waste.