I would give her 2-3 raw meals when you are home (for instance, 6am, 6pm, and just before bed), and get an automatic feeder to give her a 3rd raw meal while you're at work. They work great and have an icepack built in to keep the food from spoiling. Not sure why you would want to feed kibble, canned, or cooked meat rather than raw, and the auto feeder makes it very easy.
Amazon.com: Cat Mate C20 Automatic Pet Feeder: Patio, Lawn & Garden
I had never heard of this ingenious product so went and looked. I laughed thru this whole review of the product. Who ever said cats arent clever!
Here is the review: We have two cats: one who is finicky and a light eater and another who lives for food and weighs 26 lbs. The vet said the 26-pounder must drop his weight to 15 pounds which meant no more leaving dry food readily available throughout the day. So I purchased two of these units, one for the light-eater which would have smaller amounts in it, and one for the fat cat which would allow him to have his allotted food at regular intervals while we're at work/school.
As fat cat thinks about food all day, it didn't take him long to deduce that a meal was lurking inside the closed feeder. We came back to a kitchen that looked like a battle had taken place. He had turned the feeder upside down (thereby preventing the doors from opening when the time came) but had also removed the battery (so the time was never GOING to come!)
I did as others suggested and taped the battery in place which did prevent fat cat from removing it. However, he is smart enough to recognize that the dial is the secret and will work for a long time, pawing it little by little until he gets it to turn. Sometimes, he turns it in the wrong direction and makes the meal take longer to arrive but I think he is gradually realizing that the other direction works in his favor.
I guess I am posting this to warn owners of particularly smart and motivated cats that this may not be the answer. Our other cat has no problem with the feeder (except that fat cat steals her food out of it before she has a chance) so you definitely need to know who you are dealing with, cat-wise! Perhaps if the whole unit were a little heavier, or came with a means to secure it to the floor, it would be better for our circumstances. In the meantime, I'm planning to get some velcro to help keep it from being turned over.