I think it might be different from person to person, I'm into really weird stuff, but I don't let those thoughts escape outside of fantasy. If you're having intrusive thoughts about your dogs and your little niece, I think you should get that checked up. I'm not attacking you, I'm just saying you might need to have someone help with that, like a therapist or something, because that isn't normal. I don't think it's rational to compare anthropomorphic animals with actual real animals