Smitten with Cai's new foster kitten, Dana tries to convince Cai to adopt the kitten while imaging what it would've been like for cave-people domesticating a Smilodon. When Grandma watches over Dana, Dana's disappointed because she and Dad planned to transform her bike into a Dromaeosaurus for Dino Experiment 612: How does a Psittacosaurus use its tail quills to protect itself.

Ms. Currie asks Dana to help her choose a reptile that's most like a dinosaur to adopt for Trek's upcoming birthday. Together they scour the local Reptile Zoo and pet store for the perfect pet. Dana neglects to do her part to help take care of Nixon because she's too preoccupied with Dino Experiment 620: How do Edmontosaurus take care of their babies.

Dana uses her time at Grandma's farm to conduct Dino Experiment 615: Who would win in a fight? A Triceratops, Diabloceratops, or Kosmoceratops? Dana, Grandma and Saara all get invested and choose a dino to root for. Dana discovers the differences between dino and human babies a when Mom's friend Ashley and her new baby Ben stop by for a visit.

Dana's at the museum studying Mammoth fossils when she tells Dad and Saara a fantastical story about the cave people that lived among them. Dana and Saara are shoveling the driveway when Dana is distracted by a Troodon who has dug a den under her tree house. Dana wants to figure out why the Troodon dug the dens, but also promised to help Mom shovel the driveaway.

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