The best mouse repellent has 4 legs and a fur coat. It's called a "cat". A 5 gallon bucket with some fermenting grain in about 6 inches of water and a couple of yardsticks propped up to the rim will collect dozens of mice, especially if a soda can on a wire is added for them to walk onto. D-con and other poison baits end up causing rotting mouse carcasses to stink up the place in some very hard to reach locations. There are several very entertaining you tube videos of the bucket traps in action.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!