Paleobiology
Bakker (1990) described its environment as swampy (lungfish teeth and marsh vegetation were found in the area), and interpreted its broad feet with spreading toes as being well-suited to such an environment, especially compared to the narrow-footed stegosaurs and sauropods found elsewhere in the Morrison. He later described tightly-packed pods of 6 to 35 individuals which he interpreted as representing groups of Drinker in burrows, perhaps drowned by flooding or killed by disease. This interpretation has not attracted much attention from other workers. If Drinker was indeed a burrower, it would be among the first known for dinosaurs; the only well-supported published case of a fossorial nonavian dinosaur is the more recently discovered, distantly related Oryctodromeus. Otherwise, it appears to have been like other basal ornithopods: a small bipedal herbivore. It lived alongside turtles, lungfish, and early mammals (Zofiabaatar, Foxraptor).
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