http://doc.furvect.com/Stories/Xerox2/squidcap.html
http://doc.furvect.com/Stories/Catch22/sickday.html
Two fairly good squid tf stories from Docs's Lab.
Pics : from various places, first 2 are from Monster-girl.
I know there is no explicit process, I like to think it is sometimes implied.
Given the rare nature of the theme it's nice if the pics are posted.
If necessary I/mods will remove them.
Carillon on transfur has really good ones as well.