i have rats but same deal with the 1/4" mesh, non of my rats could get to it, so what i did was trimmed out bigger holes using very small wire cutters so that where i cut it the mesh would not have any hanging shards. (i had a rat destroy its upper pallet due to my initial go at doing this with thicker wire cutters) what i did was make 1/2" wide by 1 1/2" strips where i put the food and i never made two rows right next to each other so that that they would hold up and no one can starch the wire to get out. so that would be a 1/4" squares to separate each strip where they can get at the food. i hope this helps, if you need a better description ill try to post pics but it seems to be a chore to do on here