They know what they are talking about!! I thought we had a possum or maybe a rat, living under my back deck..... so I built a barrier fence to keep it out. I dug a trench and buried the wird about 8-9 inches deep. I just used chicken wire instead of the hardware cloth mesh , since I 'thought' I was only dealing with a small rodent. WEll...turns out it was not a possum or a rat, and I should have used hardware cloth...as that critter busted out of that wire like it was a spider web!!! I am glad this was not a barrier around my chicken house!! So when you write in and ask if you should use chicken wire for a barrier, and the folks on BYC say NO, to always use hardward cloth, please heed their advice.... as this is proof of how powerful a coon or groundhog, or whatever it is living under my deck!! NOW DH has a live trap set and ready and I am goin to redo my barrier the right way, using the hardware cloth as I should have done in the first place!!