Dinosaur Roar! by Paul & Henrietta Stickland (Good, 1997, Board Book, Dutton Children's Books)

Cover and pages have some wear. ISBN 0525458344

Dinosaurs are the gimmick here, not really the subject. The subjects are, first, antonyms--such as above/below and weak/strong--and then lunch. The paired dinosaurs, in a goofy array of pastels, are almost all smiling, even when the rhyme insists they're "grumpy"--so when they settle down to a lunch with (and not of) each other, the end is satisfying.