28 BULLETIN 301, U. S. DEPARTMENT OF AGRICULTURE. 



are probably individual, occurring in about the same proportion 

 everywhere, and while of secondary importance, in the long run 

 they are sure to be favorable to success in fox farming. Already 

 prolific pairs bring much higher prices than those which have thrown 

 small litters or have not been tested. Inasmuch as one of the main 

 causes of loss among young cubs is the timidity and nervousness of 

 vixens, the development of more docile strains will result in corre- 

 sponding increase in the birth rate. Some male foxes are much better 

 mates and sires than others. In selecting breeders the temperament 

 of males as well as of vixens should be considered. The physical 

 development and potency of males are also essential factors. Young 

 males that are not strong, or not well developed when six months old 

 are not likely to be of use in the breeding yards the first year, and 

 should not be selected for sires. 



Food is recognized as a very important element in the development 

 of good animals. The finest specimens of domestic cattle are those 

 which have been fed most wisely. As regards foxes, much remains 

 to be learned concerning the effects of different rations upon such 

 matters as potency, character of fur, and rate and limits of growth. 

 It should be a part of every breeders plan to discover what he can 

 about the relative values of foods and methods of handling as influenc- 

 ing the process of selective breeding. Ultimate success or failure in fox 

 farming depends largely upon the aspirations of those engaged in it. 

 If breeders earnestly, consistently; and indefatigably endeavor to 

 improve their stock and to produce pelts that are larger, softer, and 

 more uniformly colored than the usual run, there can be no question 

 as to the result. There will never come a time when an extra fine 

 silver fox pelt will not command a good price, or when a breed pro- 

 ducing such pelts will not be in demand. 



ACCESSORIES. 



Contentment and vigor of the animals within a ranch is of the 

 utmost importance. Whatever contributes toward increasing these 

 qualities should be incorporated if possible. It is well to test young 

 foxes with such toys as a ball, a tin can, or a piece of woolen cloth, 

 with a view to amusing them and exciting a spirit of playfulness. 

 A variety of objects in which they can hide and upon which they can 

 mount for a survey of their surroundings, as hollow logs, stumps, 

 brush piles, or open barrels, is desirable. 



While the suggestions given under this heading apply primarily to 

 those having large capital invested in fox farming, they will also be 

 found helpful to those operating on a small scale. The present value 

 of silver foxes is so great that every precaution is taken to prevent 

 accidents, sickness, or other misfortunes. Watchmen are kept on 



