Virtual Pet Simulation Games
Simulation here means one of two quite different things, and it is worth separating them before you pick.
The first is the animal simulator proper: you play as the creature, in an open world, with hunger and predators and a family to build. These are the longest games on the site and the only ones where movement itself is most of the pleasure. A session is measured in how far you got rather than in levels cleared.

Lion Family Sim Online

Wolf Life Simulator

Puppy Merge

Funny Zoo Emergency

Pet Doctor Business Tycoon-Pet care game

Fish Story 2

Idle Pet Business

Kitty Love Story

Lovely Cat Pet Life

Animal Merge Zoo Park

Lovely Virtual Cat

Call of the Jungle! Animal Evolution

Raccoon Adventure City Simulator 3D

Cat Life Simulator

Cat simulator

My Cute Pet Friend

Pets of Funny World

Animals Merge

Crazy Goose Simulator
The second is the management simulator — a hotel, a shop, a zoo. Here you are not the animal but the operator, and the loop is service, income, expansion. These reward returning rather than sitting: the operation earns while you are away.
Both sit under the same heading because they share an absence of levels. Neither one ends; you stop when you are done.
Questions about this section
Do I play as the animal or as the owner?
Both exist here — the open-world simulators put you in the animal's place, while the management ones make you the operator.
Do these games have an ending?
No. Neither type is built around levels, so a session ends when you decide rather than when a counter runs out.

