Keep doing all you can. Play aradio for him, some classical music or NPR, when you're gone, so he doesn't feel ao alone in the quiet. Talk to him when you're home, and soothe him as much as you can.

I hope the results come back quicker than a month. Was she doing a tox screen or something?

Feed him whatever he will eat. I wonder why you can't feed mash on spaghetti? As long as you don't leave it with him too long, it shouldn't be bad.