Zues is getting use to your house and exploring it when your not home. I think a big cage would be good for him just to make sure he dont get into trouble when your not home. I would hate to hear that he bit into a cord or something bad when your not home watching him. James, your a good "parront" to Zues staying up and watching him to see if he is plucking when your in the other room. Maybe he has separation anxiety and if you move his perch into your room he might sleep better. Our lovie slept in my daughters room and if we tried to leave him in the other room he refused to crawl into his bird bed and sleep at night and instead sat on a perch looking very miserable.
If you can find it Red Palm oil is good to put on there human foods they eat. I heard it really helps out there feathers and works on the inside out to his feathers. Also find some pure Aloe and add it to water and mist it with him, this will help soften up his feathers as they are growing in and help his skin not to itch so much. Pixibubbles know all about what to give birds with feather issues so hopefully she will come back and give you a better answer then I did.
Congrats on your associates degree Sinthea!