The smallest of these recognized by Guinness is the chicken-sized Compsognathus
...... About the size of a chicken or turkey, it is one of the smallest known 
dinosaurs ... compsognathus dinosaurio, smallest dinosaur, animales 
dinosaurios, extinct... [DOC] [TLE] Tyrannosaurus | Land Before Time Wiki | Fandom powered by Wikia [PAR] Size comparison of selected giant theropod dinosaurs, with Tyrannosaurus in 
purple.