In the winter I am home practically all day,but in the summer I am out ALL day,sometimes more than 8 hours.I leave them in the living room where they have their toys,their beds,their food,water and pads and I leave the radio on so they dont feel so alone.
They have always been fine,they mostly sleep when we go out.Just make sure theirs nothing she can choke on or anything dangerous that she can chew and she should be fine