Coypu farms and were reported in the wild as early as 1932. There were three unsuccessful attempts to control coypu in east Great Britain between 1943 and 1944. Coypu population and range increased causing damage to agriculture in the 1950s. During the 1960s, a grant was awarded to Rabbit Clearance Societies that included coypu. This control allowed for the removal of 97,000 coypu in 1961 and 1962. From 1962 to 1965, 12 trappers were hired to eradicate as many coypu as possible near Norfolk Broads. The campaign used live traps allowing non-target species to be released while any coypu caught were
The Fur Worker Kaufman was another editor of "The Fur Worker" during the 1920s. As of 1925, "The Fur Worker" had a circulation of around 12,000. Issues were sold at 50 cents. In its later years, publication of "The Fur Worker" became more irregular. The publication was suspended between May 1929 and January 1930. Between September 1930 and April 1931 it was issued under the name Fur Workers' Hope. Publication of "Fur Workers' Hope" was discontinued in May 1931. In June 1937 "The Fur Worker" was revived. In the same year the parent under switched its affiliation from the American Federation of Labor