Squirreled Away

From the Chicago Better Business Bureau's weekly Report of 2 April 1931 (p. 3):

The use of the trade name "Squrlpelt" to brand materials not made from the pelts of squirrels, is prohibited by the Federal Trade Commission in their order to H. Ernstberger and Carl Rosenkranz, co-partners, New York, trading as H. Ernstberger & Company.

The [FTC] order also forbids the use of labels picturing a squirrel, or the words "Squrlpelt" or other words of similar import.

The complaint charged that this company advertised "Squrlpelt" as "The genuine and original importation of the squirrel effect in fabrics." There was a picture of a squirrel and a picture of the label under which was quoted, "This label identifies the genuine."

With all due respect to the fashion tastes of the Great Depression era, my impression is that squirrels are pretty low on the chain of sought after pelt animals. If this company wasn't using squirrels, what were they using?