Life stages (pet)

Like Sims, pets age in stages.

A pet starts as a kitten or puppy or foal and ages to an adult. In The Sims 2: Pets and The Sims 3: Pets, an adult pet will eventually age to an elder, and will eventually die. However, in The Sims: Unleashed and The Sims 2 Pets for console, adult pets live indefinitely.

In The Sims: Unleashed, kittens and puppies are objects, and appear as maternity tents topped by a cat face or dog face. The mother will watch them, but it is not possible to interact with 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. They are mobile, but cannot climb stairs, and must be carried up and down them. They cannot be taken to community lots. They cannot have jobs or learn commands, but they can learn behaviors. While they cannot get on beds or furniture, they can be praised for not getting on them, and therefore trained to stay off them. This stage lasts three days.

The adult stage lasts 25 days for cats and small dogs, and 22 days for large dogs. Dogs and cats are the only playable pets, but players can buy a fish tank, bird cage, or womrat for Sims to care for.

Elder pets can retire from their career. However, they cannot get jobs.

In The Sims 3: Pets, all animals start out as an adult (unless born in-game). Cats are kittens for seven Sim days, they are adults for twenty-eight Sim days, and they are elders for seventeen Sim days, then they die. Dogs are puppies for seven Sim days, they are adults for twenty-five Sim days, and elders for fourteen days, then they will die. Horses are foals for five Sim days, they are adults for thirty-five Sim days, and elders for seventeen days, then they will die. All living pets are fully controllable at all life stages, and all living pets can learn new skills at all life stages.

Only adult pets can get pregnant, elder males can make an adult animal pregnant.

Death
In The Sims: Unleashed, pets, like Sims, do not age and have indefinite life spans. They can die, and have their own gravestones, but death is not inevitable for them.

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. When a pet dies, the Grim Reaper will come to take the animal away. Other dogs on the lot will surround the Grim Reaper in a circle and howl. Cats arch their backs and hiss.

Pet deaths have their own unique cinematics. 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. Pets also have their very own gravestones, and a special memory is also added when a pet dies.

In The Sims 3: Pets, all animals will eventually die. They can die of starvation, fire, drowning, and old age. A dog will die after forty-six Sim days, a cat will die after fifty-two Sim days, and a horse will die after fifty-seven days. When a cat dies, the Grim Reaper will throw a mouse; when a dog dies, he will throw a dog toy; and when a horse dies, he will throw hay. All animals have unique gravestones.

In The Sims 3: Pets, stray cats, lost dogs, and wild horses will also die eventually and get a gravestone. As they die, the other stray animals will surround them, along with everyone else on the lot.