Compsognathus

Compsognathus are the smallest dinosaurs housed in Nublar. The size of a chicken, this small coelurosaur is highly social and forms unorganized gangs that can reach to be of dozens and, rarely, hundreds of individuals.

These theropods are partially coprophagous, this means, a substantial part of their diet is constituted of fecal matter of other dinosaurs. This is actually really useful and one of the main reasons these animals are housed in large quantities, they take from the shoulders of the workers the stress of having to clean one big pile of... poop!

Compsognathus also has to compliment its diet with another thing: meat. An opportunistic animal, compies will clean corpses to the bone, and, if on large enough groups, can take down on far larger prey than themselves. Alone, they are not much more of a threat than a snake or a very large rat.