Bantams are the best!!! Mary
Not enough meat on them Mary, just not enough meat.

MiC&G, one thing to watch for if you line the inside of that wire with something with smaller mesh, do not create pockets where a chick or larger chicken can get between the two wire meshes. I’ve had that happen. I’m not sure if the chicken got in through the end or from the top but close up those gaps.
I think that 1x2 is a good choice. It’s not perfect of course, it’s not a solid wall, it has limitations. It should stop the bigger things for getting in and the smaller ones are really hard to stop anyway. They can climb so well and squeeze through some really small holes. Things hardly ever go exactly as you plan so observe and be flexible, but I think you have a good base to build on.