My Zoey is fully potty trained and was at 6 months. I'm a teacher so I had all summer to train her and when I went back to work in September she was home from 7:15-3:30 every day and no accidents. That's 8 hours and 15 minutes. While I do leave food and water out, I don't think she eats or drinks, she knows her own limits...very smart.
My 4 month old baby boy however is having a little harder time understanding he can't go in the house
He still has another month and 1/2 before I go back to work but if he doesn't hold it he will continue to be in his cage while I'm at work.
sooooo it's possible just have to work at it.