Gallimimus

Gallimimus ("chicken mimic") was a ornithomimid from Mongolia. It replaced Ornithomimus and Struthiomimus in fiction after it appeared in Jurassic Park.

Iberomesornis' Idea
Gallimimus would have a few rivers in its exhibits, with algae and mollusks to feed. Gallimimus, like Ornithomimus, would also use rats and mouses as live prey.

Saurian's idea
Gallimimus need large enclosures, similar to a flamingo's habitat. They eat mollusk, small animals, insects and algae and get their pink plumage from the latter. It is not recommended that you feed them too many prey items at once, for they forget about things quite easily.