My girlfriend just sent me an email that her dog walker can't do it any longer. My girlfriend's dog is 2 years old but has gotten used to being walked 2 - 3 times a day while she & her husband are at work. She asked me about a Doggie Litter Box in case they can't get a walker to take her dog outside during the day to go pottie. They don't have the time to train the dog to hold it longer and don't want to clean up a mess when they get home. I told her I'd ask here if anyone used one and what kind.