Ferrets and guinea pigs both make great companions, but key differences exist:
Temperament: Ferrets are more active, playful, and mischievous. Guinea pigs are more docile, social, and enjoy relaxing.
Size: Ferrets grow up to 2 feet long and weigh 1–2 pounds. Guinea pigs grow to about 1 foot and weigh 1–3 pounds.
Lifespan: Ferrets live 5–8 years; guinea pigs live 4–6 years.
Diet: Ferrets are carnivores needing high-protein diets of meat, eggs, and fish. Guinea pigs are herbivores needing hay, fruits, vegetables, and pellets.
Care: Ferrets require more care, including special diets, regular vet visits, and plenty of play. Guinea pigs are relatively easy to care for.
Choose a ferret if you want an active, playful pet; choose a guinea pig if you prefer a docile, social companion.