Today when I was playing Skyrim I decided to visit my family, when I got home I saw that my son has a pet Mudcrab, has this happened to anyone else? Because in all my hours of skyrim I've never seen a child have a pet?
Yes, they do that with Hearthfire. If you bring home a dog, they will ask to keep it, but if you don't, they'll find their own. I believe they can pick skeevers, mudcrabs, foxes, and I BELIEVE spiders, maybe.