Question: what is the minimum size for a guinea pig cage?
Answer: Why size matters The following guidelines are useful to determine the space needed for guinea pigs. One guinea pig: 7.5 square feet cage (minimum), but more is better; generally 30" x 36" is a good size. Two guinea pigs: 7.5 square feet (minimum), but 10.5 square feet is preferred; generally 30" x 50" is a good size.