What is the method of analysis for determining that it is cocker spaniel hair 
as opposed to mutt hair with only partial cocker spaniel DNA? What is the 
critical cocker spaniel content for best performance? Is there a detrimental 
level of non-cocker spaniel hair that may compromise plaster durability? Does 
it matter if it's male, female or neutered cocker spaniel hair? Is American 
cocker spaniel hair OK, or do we need to import it from someplace that has 
centuries more cocker spaniel history?

Mike E

---------- Original Message -----------
> Goat's hair is what we usually (in the two cases where we've actually 
> had it formally identified) find in late 19tn and early 20th century 
> lime/sand/hair plaster. Several later casual identifications I've done 
> myself with the trusty pocket microscope from that period looked like 
> goat's hair. We have also seen cow hair, wool, and cocker spaniel hair.
> 

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