What if Janeway's dog Mollie had ended up in the Delta Quadrant? I bet Janeway would have been unbearable about it. She would probably insist that everyone salute her, and keep making jokes about how Mollie outranked Harry Kim. Janeway would have all the doors modified to open for her, and she would get Mollie her own com badge and would always be calling her and doing a lot of baby talk and trying to get her to bark. There could have also been a story about how Janeway takes Mollie down to the Airponics bay to crap, and instead of picking it up she just blasts it with her phaser, and it makes the whole place stink. Then Kess would get really upset, and probably everyone would get sick from eating the vegetables. -or maybe The ship starts having problems and they discover that Janeway has been letting Mollie crap in Fair Haven for a long time, and then the Doctor starts to stink because the ships holographic matrix is corrupted, or something. There's also a lot of room for jokes about how Neelix wants to cook her. She could also sense things and get knocked up by aliens like Counselor Troi. I think it would be great.