You can keep your mouse at the wdw kennels. There is an extra expense for the kennels. I would guess the cost for a mouse would be the same as for a dog or cat. VWL is partiuclarly convenient to two kennels, one at the ttc (there is parking right there), and one at ft. wiliderness. Because they usually service dogs and cats, you should bring your own container to keep your mouse in. Also, they won't take your mouse out of the container, so you should plan to drop by once or twice each day to see how the mouse is doing. No animals, besides service animals, are allowed to stay at the
dvc resorts. You should be able to just show up at the kennel with the mouse and a proper container. I'd be sure to check out the water bottle, feed, etc. I understand that they house a lot of unusual animals at the kennels, and I'm sure keeping a mouse there will not seem like a strange request.