The mice and voles will have to be one or the other to get through that wire. There again they will probably have their own wire cutters.
(http://i142.photobucket.com/albums/r111/stumpinsci/Picture073.jpg)
I see the humble mouse has the largest brain relative to it's size of any animal. Admittedly a large proportion of this will be devoted to Sex, Not Being Eaten, and Finding Where My Peas Are Buried, but I think it will have sufficient spare capacity to make light work of your puny defenses
I think a mouse can easily pass through those holes.
I would just like to thank you for you over whelming support for my deffence against the little critters LOL But i have a cunning plan they will be offered some thing more appetizing in a box from which there is no return. ( providing they cant pick the lock)
I prefer the ones that give them a sharp and terminal crack on the back of the neck.. ;D