If you have sims 2 seasons are the pets included or do you also need the expansion pack installed?

Like when I play sims 2 will pets be added to the game without the expansion pack being added?If you have sims 2 seasons are the pets included or do you also need the expansion pack installed?if pets are included, it will say it on the box. If not, you'll need to buy the pets expansion.If you have sims 2 seasons are the pets included or do you also need the expansion pack installed?You also need the "Pets" expansion.If you have sims 2 seasons are the pets included or do you also need the expansion pack installed?To get pets on Sims 2, you have to get the Pets Expansion Pack.