keep in mind that the inside of most dog food bags is treated to keep the product fresh so, depending how quickly you go through the food, you may not have to worry. i wish every leader has this king of thoughts. however if you plan to stay in the us for a longer time in order to drive you will need to get a us drivers license, which requires a social security number. keep this one in your back pocket. i was a little worried about the cost so i first visited the other doctor. 