If you own a dog and are coming to visit my family and stay in my house, don't call the day before and say you couldn't find anyone to dogsit and you're wondering if it's okay to just bring the dog along with you.

No, no it's not okay. we don't own a dog specifically because we don't want a dog or dog hair and slobber all over our house. We sure as heck don't want YOUR dog hair and slobber all over our house!