Which pets-related expansion pack do you like most?

I love the pets, including horses and small pets, in Sims3! In Sims 3 you could control your pets and the household limits were the same as sims 2, allowing pets beyond the 8 sim limit. I love having pets but often can't in Sims 4 when want a larger family. I don't understand why they chose to do that because you can't even control the pets.