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For additional meanings of "Molly", please see Molly.

Mollie was an Irish Setter, kept by Kathryn Janeway as a pet in the early 2370s.

Mollie, who was the runt of the litter, was rescued by Janeway from a dog pound on Taris Seti IV. Janeway chose her because she thought the dog "had spunk." (VOY: "Shattered")

Mark Johnson looked after Mollie when the USS Voyager was lost in the Delta Quadrant. (VOY: "Caretaker")

Janeway kept an image of Mollie and Johnson in her ready room. (VOY: "Eye of the Needle", "Prime Factors", "Elogium", "Initiations") Mollie had a litter of puppies shortly after the Voyager's disappearance. By 2374, they had grown considerably and got along with Johnson's new kitten. (VOY: "Hunters")

In the second draft script of "Prime Factors", Janeway's dog was named "Oakley" and was said to be a golden retriever.
As evidenced by the first draft script of "Flashback", Mollie was originally to have appeared in that installment, in a memory of Janeway's. However, all mention of the dog was eliminated from the episode by the time the final draft of the script was issued.
The script for "Shattered" spelled her name as "Molly".
The novelization of Caretaker (p.20) named this dog "Bear" instead of Mollie.

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