but their water needs are less exacting. Nutri- 
tional information about these groups of wild- 
life are often extrapolated from domestic fowl 
and laboratory animals; thus, needs under 
range conditions are not well known. 
Native forage usually contains sufficient 
minor elements to satisfy the needs of range 
animals; however, certain elements may be lo- 
cally deficient. 
Vitamins A and D may be deficient in late 
winter on ranges where green feed is sparse 
and when the weather is cloudy. 
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