You don't have to keep such a strict interval between feedings. Feed her in the morning when it is convenient and again in the evening, when convenient for you. Mine eat anywhere between 6:30 and 8 in the morning, depending on the time of year, and between 5 and 6:30 in the evenings. Also, they go out right after dinner, and then don't go out again until they get up the next morning, usually about 12 hrs, their choice. Unless she is waking you up to go out in the middle of the night, I would take her out after dinner, then not worry about it until the next morning.