This is the second double cage we've ordered. The first worked fairly well, but required hours of bendign to get it to fit together- seriously, there was about zero quality control practiced in where joints were soldered, how doors were hung, etc. But at least that one worked. We just received one that we had ordered and were ready to get our rats put into them (the cages they are in right now are way, way too small to keep them in much longer) and we found that five different parts were missing, and the top grid was severely dented with part of the powder coating gone! This is absolutely unacceptable! There was zero damage to the box (and obviously completely missing items are not the fault of any carrier) so this is very simply a perfect example of terrible quality control practices.