PRACTICALLY the only animals that are now being bred commercially for their fur are silver-foxes, minks and rabbits. Others have been tried, but costs of feeding, overhead charges generally, and difficulties of inducing breeding in captivity made the price of the skins greater than that of equally good wild-caught examples, so that the undertakings camet an end. To some extent, the first needs in this relatively new industry were the testing of equipmerit, the perfection of methods of management, and the control of diseases and parasitic infestations. These problems have been tackled, but until recently no attempt had been made to discover by controlled experimental work the diets most suitable as regards results and costs for the carnivorous animals recently taken frorii the wild. The Yearbook of Agriculture for 1939 of the U.S. Department of Agriculture contained an article by Charles E. Kellogg on “Nutrition of Fur Animals”, which has been reprinted as Yearbook Separate No. 1717 (U.S. Govt. Printing Office, 1940). It contains in 22 pages a summary of the scientific work carried out at the four or five experimental stations in the United States where nutritional research with fur animals has been carried out. It is impossible to indicate the findings here; but they should be of value to breeders of fur animals in this country, whenever circumstances permit again the development of the fur-farming industry.