Data For 1934 Include 1.36 Million Sheep And Lambs Slaughtered For Government Account (Drought Relief). Source: Bae, Livestock, Meats, And Wool Market Statistics And Related Data, 1938, P. 25.
This NBER data series a01047a appears on the NBER website in Chapter 1 at http://www.nber.org/databases/macrohistory/contents/chapter01.html.
NBER Indicator: a01047a
Release: NBER Macrohistory Database
National Bureau of Economic Research, Sheep and Lambs Slaughtered Under Federal Inspection for United States [A0147AUSA445NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/A0147AUSA445NNBR/, July 31, 2015.