Weasel Press is the actual publisher, but Laura Lewis is the one who conceived of the idea and did the majority of the work. Rabbit Valley is a distributor with booths at many furry conventions. Amazon is familiar to you, I'm sure, and in this case is only a distributor, not the publisher. Smashwords is the publisher of the electronic versions, and distributes them without DRM. Typically, Smashwords e-books eventually become available through Amazon's Kindle store, as well as Nook and Kobo outlets.

If I understand your question, then you probably want to order the print edition from Weasel Press, or the e-book version from Smashwords. Those are the respective original publishers.

I haven't read all the stories yet, but the ones I read when I helped with proofs were very well done.