Kids who appear to be fine at birth but develop symptoms at around three months of age are said to have the delayed form of copper deficiency. Evidence of atrophied muscles appear, tremors and incoordination occur, and leg weakness is displayed. Usually the problem appears in the rear legs first, but not always. Kids with front-leg weakness will spent lots of time on their front knees. Kids with rear-leg weakness will pull themselves around by their front legs.
Death occurs from secondary problems, like pneumonia.
Secondary copper deficiency tends to be more responsive to treatment than primary copper deficiency. Insufficient weight gain, poor appetite, and weight loss are seen in copper-deficient goats of growing age. Adults display more subtle signs of copper deficiency. They are generally unthrifty, anemic, poor milk producers, and sometimes have diarrhea. But the most visible sign of copper deficiency in adults is loss of hair color.