I think it was cool to see them there as well. First time my sim, Ara went to vacation she was low on social in the market place so she befriended a dog named Molly. I wasnt planning on having a pet for this sim, but they where best friends in 5 or 6 social interactions and she followed my sim when i traveled. I went to see if i could adopt her and it didn't give me the option to do so. I ended my vacation ealy and invited her to hang out at my place so i could see if the interaction would pop up. It didn't.. i was kinda bummed tried a few things and nothing was working. So finally went to put the dog hangout trait on my house reloaded the game and there she was an hour later. So now shes safe and loved with Ara. Has anyone else tried to adopt a pet on vacation? Just curious to see if the option popped up for you.