unthriftiness(redirected from selenium-responsive unthriftiness)
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failure to grow or to put on weight as well as expected in the presence of adequate quantity and quality of feed, and in the absence of overt clinical signs of illness. Called also illthrift. See also weaner illthrift.
occurs in young animals that are weaned at too young an age or without being weaned onto a suitable transitional diet.
a condition seen in marginally deficient areas; affected ewes respond well in terms of body weight and milk yield to supplemental selenium although their clinicopathological indicants are in the normal range.