The Pendleton Woolen Mills has filed a trademark infringement lawsuit in federal court against the Pendleton Round-Up over "Let'er Buck” cologne. The Round-Up's attorney, Sheila Fox Morrison, they'll defend the Round-Up's right to use its name as well as its own copyrighted slogans. In a statement;  the woolen mills says it's worked with the Round-Up for over 100 years and that while the disagreement is unfortunate.  They need to protect their trademark.