[header] How to care for a crested guinea pig [title] Give your guinea pig the largest possible cage. [step] A larger cage will give your pet more space to get some exercise, which is important for guinea pigs. Since guinea pigs don't use wheels or balls for exercise, the larger cage is more important because it allows them space to run around. 
[substeps] For one guinea pig, your cage should be at least 2.5-feet (. 76 meter) by 3-feet (.