Dogs, cats, and guinea pigs join the household and live as genuine family members — not decorations. Their personalities are procedurally individual: some are clever, some friendly, some high-energy, some silly. Training unlocks new behaviors. The central town park provides a space for Sims and their animals to interact with other households and their pets. Accessories, furniture, and specialty items are available through local shops. Animals age over time, as Sims do.