A dog created by Ensign Tendi through genetic engineering in Much Ado About Boimler, which turns out to talk, change shape and walk on ceilings because its Orion maker had never seen a real one.
The Dog is an artificial animal built by D'Vana Tendi in the Lower Decks episode Much Ado About Boimler. Tendi engineers what she believes is a perfectly ordinary pet. Because she has never actually met a dog, she sees nothing odd in one that speaks, crawls across the ceiling and rearranges its own body.
The creature unsettles everyone else aboard, and Dr. T'Ana has it sent with the transporter-damaged Brad Boimler to the Farm, the medical retreat run by Division 14. Tendi goes along to look after her pet, and the voyage is disrupted when the other patients, convinced the Farm is a lie, rise up against the crew before learning that it is the pleasant spa it was said to be.
At the Farm the Dog calmly tells Tendi that it is content, says goodbye and flies off into the sky, leaving her to conclude that perhaps it was not quite a normal dog after all.