Well, you have gotten some good advice. I would add crate training and obedience training to the list. The first, because a room of her own (an airline type, not a wire type) will give her the "den" security and keep her contained when you're not there. It must fit her properly, one and a half times her body length is best. That allows her to lay out on her side, but not have enough room to make messes or to really get a running start at the door, if she is so inclined.

Obedience training will help you both. It will teach you how to work with her in a positive manner and it will teach her that she is not the leader of the pack and what the "rules" are. It should give her enough self-confidence to accept being alone for periods of time. Taking her with you all the time is simply adding to the problem. She expects to go when you do and anything else is not acceptable. So, get a decent crate (not the doghouse as she will get out of it no matter what you do) and teach her to go into it with treats. Allow her to go in and out at first and then close her in for a minute or two. Praise, praise, praise if she does well. Then, after a while, you can put her in the crate for a bit while you are home and let her get used to it that way. Eventually, she'll accept the crate as her own. Do not put bedding or toys in to begin with as she may just destroy them and choke on the pieces. Then, when you have a short jaunt to take, say going to the store for a soda, put her in her crate with a small treat and go. When you get back, if she's being good, let her out. If she's barking and acting out, leave her in until she settles, then, let her out.

Please don't leave her outside when you're gone. Not only is she likely to go over the fence, but the heat at that altitude can kill her. You have very little pollution or heavier atmosphere there to modify the heat and unless you keep her out of doors all the time (which I abhor), she will not be used to the differences in temperature and will suffer stroke or exhaustion.

As for food, it's not protein that makes a dog hyper, it's corn. Are you feeding her a good quality dog food? They may appear more expensive, but if you feed her a chicken and rice or lamb and rice diet, you should find that you are feeding less overall and the lack of corn in the diet (a complex carbohydrate that keeps the blood sugar up for longer, thus creating an active dog) might make her more mellow. I know you said that she sleeps a lot, but most of that is a sham. She is telling you that you are free to do what you want within the confines of the house, but she has to be with you any other time. This is a very subtle dominance behavior. That's why I suggest the obedience work as well. You also might want to look at how consistent your/her schedule is. Do you feed her at the same times every day? Do you pretty much have a routine you follow? You will have when you go back to work (have you considered a third shift job when she's more inclined to be asleep?) and you might consider setting one up now. Get up about the same time every day, let her out and then feed her while you get ready to go out. Another trip out for more potty and then into the crate with a piece of carrot or her food or other small treat. Then, go out the door for a few minutes. Don't come back in when she's noisy (if she is) and don't make a big deal of it when you come back. Put her out to potty again and then just act like life is fine when she comes back in. If she wants to play, fine, play a while. Since you will have to have some sort of routine when you return to the working world, it might as well begin before then so you both have time to adjust to it.

Another note on the food thing -- a good quality food means less mess in the yard -- think about that.

Hope this helps and good luck.