They look like giant black bulls.
They are enraged by the color red. The first-generation bull sometimes bleated like a sheep, and the second-generation ones clucked like chickens.
Powers and abilities
They are stronger and faster than regular bulls.
Shaggy & Scooby-Doo Get A Clue!
Shaggy Rogers and Scooby-Doo were attacked by a first-generation one at the Tex-Oka-Sas Tri-State Fair. Phibes wasn't pleased with it, and threatened his techies if they didn't improve on the design. They created a second set, but that bunch had chicken tendencies.(Scooby Dudes)