An appropriately sized cage will not get dirty as quickly, which will create less of an ammonia build up and keep your guinea pigs healthier. (northstarrescue.org)
Provide it with a good size cage with some entertainment and exercise equipment. (caringpets.org)
Having the right sized cage is important for birds, as they will spend much of their time eating, playing and observing life from their home. (wingdom.com)