In The Sims 3: Pets, all animals will eventually die of old age as in the previous game. Pets also have their very own gravestones, and a special memory is also added when a pet dies. When a horse dies, the Grim Reaper will ride it through a portal to the Netherworld. A dog's death will result in the Grim Reaper throwing a stick and the dog fetching, while a cat is thrown a ball of yarn. Pet deaths have their own unique cinematics. Other dogs on the lot will surround the Grim Reaper in a circle and howl. When a pet dies, the Grim Reaper will come to take the animal away. In The Sims 2: Pets, pets will eventually die of old age, that being the only way they can die, as a police officer will take the pet away before starvation. They can die, and have their own gravestones, but death is not inevitable for them.

In The Sims: Unleashed, pets, like Sims, do not age and have indefinite life spans. Some traits have unique attributes for one of the two species, but most traits are identical to one another. These traits control the pets' actions and reactions towards the surrounding world.

Both cats and dogs can have three different pet traits, which are unique to them and are not available to Sims. Pets can also die, but only from old age. They will live through these life stages like normal Sims, but much shorter. Sims can interact with these pets in various form of ways such as feeding, playing and training, and are able to bond with them through these interactions.Д«oth pets have three life stages kitten/puppy, adult and elder. Unlike previous games, pets cannot be controlled by the player, similarly to The Sims 2: Pets, and there is no cheat that will allow the player to do so. In The Sims 4: Cats & Dogs, Sims can own cats and dogs as pets, which are the main feature of the expansion pack. Only adult pets can get pregnant, elder males can make an adult animal pregnant. All living pets are fully controllable at all life stages, and all living pets can learn new skills at all life stages. Horses are foals for five Sim days, adults for thirty-five Sim days, and elders for seventeen days, then they will die. Dogs are puppies for seven Sim days, adults for twenty-five Sim days, and elders for fourteen days, then they will die. In The Sims 3: Pets, cats are kittens for seven Sim days, adults for twenty-eight Sim days, and elders for seventeen Sim days, then they die. Unlike Sims, who age at 6:00 pm (18:00), pets age at 11:00 am. The adult or elder stage can be extended by having the pet eat the Kibble of Life. The length of the elder stage is 6В to 11В days, and is random. The adult stage lasts 26В days for cats and small dogs, and 22 days for large dogs. While they cannot get on beds or furniture, they can be praised for not getting on them, and therefore trained to stay off them. They cannot have jobs or learn commands, but they can learn behaviors. They are mobile, but cannot climb stairs, and must be carried up and down them. In The Sims 2: Pets, kittens and puppies are independent family members with their own needs, though they do not have the Scratch or Chew motives. The mother will watch them, but it is not possible to interact with them. In The Sims: Unleashed, kittens and puppies are objects, and appear as maternity tents topped by a cat face or dog face. However, in The Sims: Unleashed and The Sims 2 Pets for console, adult pets live indefinitely. In The Sims 2: Pets, The Sims 3: Pets and The Sims 4: Cats & Dogs, an adult pet will eventually age to an elder, and will eventually die. A pet starts as a kitten, puppy or foal and ages to an adult.

Sims 4 custom lifespan