The set up I have does, as the electric poultry netting is sitting on top of the thick black tarp stuff ( path liner, weed preventer - has a variety of names, but is permeable to water, but not plants/grass/weeds. As long as I keep that clear, flat and the fencing is taut - I have 4 wooden corner posts that are used as strainers, as the plastic posts that come with the netting are quite flexible. Anything ( mice, rats ) that tries to cross the fence will have to come into contact with the electric netting at some point, as it is on the ground, and has quite fine holes. I do keep it clean and make sure I don't stockpile food in there - they get enough for the day and a little more ( so they are not hungry in the mornings ! ) but I try to make sure I don't leave anything that encourages vermin.