UPDATE: April, 2016
Shelter volunteer Lesley Allen has created hundreds of hammocks since this article was written. We’ve revised the cat hammock instructions based on Lesley’s years of trial and error and are including it on this post. How to make a cat hammock for OAS cats, updated 2016
Oakland Animal Services’ kitty hammocks were featured in the Humane Society of the United States’ most recent issue of Animal Sheltering magazine (pdf download here).