This is a test of commonsense. Complete the next sentence:

How to help your guinea pig live a long life
Buy the right cage.
Provide at least 10 square feet of living space for two guinea pigs. This space prevents conflicts between males, fighting between guinea pigs, and reduces the risks of bloat, obesity, and gas build-up by providing adequate room to exercise.
Test a few cages and look for one that you can clean easily. Can your hand enter the cage easily? Can you use a brush inside it? Make sure that the cage is light enough to keep your guinea pig happy.