They are. I like that the eggs roll out and stay clean. My old pens I built were tilted, but the eggs were too big to roll out. The eggs were dirty and sometimes pecked at or cracked. I paid quite a bit for the cages, but the convenience is worth it.
Chicken-Farmer
Waterfowlweirdo,
I don't have a manufacture name on mine. But the closest thing I've found are by alternative designs. http://www.altdesign.com/test/quail.html it looks like they are labratory cages. I really like the ease of cleaning and the quality of construction.
Chicken-Farmer
I purchased a commercial battery cage from a seller in Baton Rouge, LA. The cage is all stainless steel with rubber covered wire flooring. Originally 48 cages. Four tiers of 12 cages each. I modified the cages, removing every other cage partition. Now I have a battery that consists of 24 cages...