Hmmm. That cat showed up after someone was evicted. Interesting. Of course, that doesn't explain why she's not eating or seemingly hungry.

You might take a look at the link CyborgQueen posted upthread re: shelters. There are some good suggestions there. We were originally going to build one, but time is getting away from us, so we ordered the FeralVilla instead, although with some cat-nip spiked bedding. It'll be somewhat more expensive than handbuilt, but without the added shipping, it was worth the time savings.