1/2" mesh is too large for anything smaller than a large juvenile, remember with rodents that if the head will go through, so will the rest, and quite easily. And yes, they will chew through almost anything given any opportunity. The mortar tubs I use have a little hanging hole in the center of one end, and I rivet aluminum flashing over it to prevent chew through. But I have someone in one colony who is chewing through that, albeit slowly, so I may have to find some thin stainless to use instead.
Oh, and when I sell colony groups, they come from a bulk holding bin, and I prefer people get 3-4 females and at least 2 males. I've had customers come back a couple times because their single male got killed, but an extra can always be fed off if not needed.
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