What could be a sign of chronic wasting disease in deer?

Chronic wasting disease (CWD) is a progressive and always fatal neurological disease affecting deer species. It is characterized by specific symptoms that indicate the presence of the disease. Unusual behavior or physical symptoms such as weight loss are among the most recognized indicators of CWD. A deer suffering from this disease may exhibit a range of signs including emaciation (extreme weight loss), changes in posture (such as a lack of coordination), and altered behavior, such as becoming more lethargic or less social. These symptoms stem from the disease's impact on the animal’s brain, leading to the observed behavioral changes.

In contrast, a healthy appearance and normal behavior would suggest that the deer is not affected by CWD. Increased activity levels typically do not correlate with the symptoms of the disease, as affected deer may actually show reduced activity due to weakness. A change in coloration of fur might occur in various circumstances but is not a specific symptom of CWD. Hence, recognizing unusual behavior or physical symptoms, especially weight loss, is crucial for identifying potential cases of chronic wasting disease in deer.