We purchased a C&C 2x4 for our to males. we first purchased two smaller cages. they were so unhappy. the sizes one cage was 28x17x15 and the other was 18x30x5. even though we used a bridge to join the two cages it was still small. The clean up was hard because it did get dirty often. they are so happy with there new C&C home with double ramps and upper deck, The whole family helps with the clean up and up keep.. now instead of just sitting around, they chase each other and popcorn and have fun.