What is one common consequence of untreated frounce?

When dealing with untreated frounce, which is a disease caused by a protozoan parasite affecting birds of prey, it is important to understand the severity of the health implications. The correct answer highlights that one common consequence of untreated frounce can lead to potentially fatal respiratory issues.

Frounce affects the respiratory system and can result in severe inflammation in the throat and respiratory passages, leading to complications such as secondary infections or aspiration pneumonia. These health challenges require immediate veterinary attention. If left untreated, the progression of the illness can significantly compromise the bird's ability to breathe, potentially resulting in fatal outcomes.

In contrast, the other options do not represent the serious health risks associated with untreated frounce. Improved feather quality, increased hunting proficiency, and dehydration are not directly linked to the consequences of this parasitic infection; in fact, poor health from an untreated condition could lead to decreased hunting proficiency and overall well-being. Therefore, understanding the potential for respiratory issues in untreated cases is crucial for the health management of birds of prey.