Diarrhea in raptors may indicate which of the following issues?

Diarrhea in raptors can indeed suggest a variety of health issues, and in this context, the best choice relates to specific parasitic infections. The presence of tapeworms, roundworms, or coccidiosis in a raptor's gastrointestinal system can lead to gastrointestinal upset, often manifesting as diarrhea. These parasites disrupt normal digestive processes, leading to improper nutrient absorption and can irritate the intestines, which results in loose stools.

While other options do mention serious medical conditions, they typically do not directly correlate with diarrhea as prominently as the option regarding parasitic infections. For example, lead poisoning and liver problems can lead to a range of symptoms, but diarrhea is less definitive compared to the effects of parasites on the digestive system. Therefore, when observing a raptor with diarrhea, the likelihood of parasitic infections as a cause is quite significant, making that choice the most relevant.