I've played for 2 hours now. My main criticism is that picking up a pet looks very awkward -- kind of a combination of clipping and teleporting.
I made a new Sim, gave her a cat in CAS, and sent her to live in one of the cheap houses in Brindleton Bay, the one near the beach. I love the new clothes and hair. She has the Animal Lover aspiration.
I found that if you click on the pet's picture, the camera will follow the pet, which is how I found that my cat got sprayed by a skunk first thing. She also picked up a present for her owner -- a gnome, which could be sold for $280. The cat has also scattered birds a few times and brought some feathers to her owner. Twice Gunther Munch took them instead, but the 3rd time my Sim managed to get them. There were 3 feathers in the pile.
While on the beach my Sim met a stray dog and managed to adopt him. She did some friendly interactions and offered friendship. The first time she did that the dog growled at her, but after she gave him a couple of treats, he was ready to be friends. When the "adopt" interaction showed up, I had her go for it. The dog's traits are hunter, glutton, and loyal, and he does sleep at the foot of her bed -- on his back. A couple of times the "What's wrong?" interaction showed up. One time the dog needed to pee, so she instructed him to do that. He pooped as well, and she stepped in it, which was cute.
Off to explore more, but I'm happy with the pack so far.