Never eaten mouse. I would were it necessary. I`ve eaten squirrel--both grey and red--and muskrat. Meat tastes like meat. The flavour of the meat will often depend on what the animal`s been eating. (For example, corn-fed raccoon tastes like shit, imo.) I expect mice would be ok provided ya spiced them a bit. There wouldn`t be too much fat on them, so likely slow cooking with some vegetables, pepper and garlic would help the little tykes get tender. I don`t think we`re gonna see mice or voles at the local supermarket anytime soon, but ya get hungry enough, and meat is just meat.