Speaking of keeping your dog (or dogs) secure, childproof locks for rear doors and windows is super important. Make sure the car you are thinking of purchasing has this feature. These childproof systems are not only childproof, they are dog proof too. Dogs have been known to roll down windows or unlock car doors with their paws and fall out of the auto. You don’t want that. Childproof locks are standard on most vehicles these days but it never hurts to check.