I've got 5 or 6 different breeds and trying to get eggs to incubate so I bought a roll of weld wire with 2"x4" holes and made 15'x4' for my breeding pens. I used old lumber from a yard fence that was remove. The wire was about $60 and made two pens out of one roll. If anyone is interested I'll post pics. Took about 2 hrs per unit to assemble.