My dogs stay in the house without being let out for that long while I'm at work and they do fine. Yes I've had some messes but just if they are sick. Luckily I do have the option of taking them to work with me if I know they are sick. But I leave at about 7:45 am and I don't get home until 4-5 and they are fine. Sometimes Corby lets them out at lunch and they don't even get up to go outside.