Posted by Jill Sibley on Wednesday, 7 March 2007, at 9:23 a.m.:
In Reply to: weaving or spinning Dog Fur posted by Kim Mason, Los Angeles CA on Tuesday, 6 March 2007, at 8:36 a.m.:
This might give you a place to start...there are some sources mentioned in an article in Stephan's Florilegium (search the page for the term "dog"):
http://www.florilegium.org/files/TEXTILES/spinning-msg.html
(They mention books that can help you document the use of dog hair in medieval spinning.)
Also see if you can find any archaeological works that analyze textile fragments found at 12th-century sites.
If there were weaving/spinning guilds in that period, see if you can find any works that cite any rules or restrictions specific to dog hair (if you can find that they tried to restrict the use of dog hair, you know it was being used).
You might also research people's attitudes about dogs in that period, and if their fur was considered worthy to use in clothing (either as pelts or combed from the dog to use in spinning).
Let me know what you find out!