Posted: 27/03/2015 at 06:35
Mouse droppings are really quite small - are you sure they're not rats?
If they're mice I wouldn't worry at all - the compost is fine to use (although as always you should use gloves when handling compost).
Compost should be turned/stirred/aerated regularly and kept moist - that should make it much less attractive to mice.
Hope that helps.