What diagnosis should be considered with symptoms of uncontrollable shaking?

The correct diagnosis to consider with symptoms of uncontrollable shaking is apoplexy. Apoplexy, particularly in the context of birds, refers to a sudden and severe incident often associated with a neurological event, which can lead to symptoms such as tremors or uncontrollable shaking. Apoplexy can occur due to a variety of underlying factors, including stress, injury, or existing health conditions.

In contrast, coccidiosis is a parasitic disease affecting the intestinal tract, primarily leading to gastrointestinal symptoms rather than neurological signs like uncontrollable shaking. Frounce, which is caused by a protozoan and affects birds, typically manifests as respiratory issues and swelling around the mouth and throat rather than shaking. Aspergillosis is a fungal infection primarily affecting the respiratory system, and while it can cause various symptoms, it does not typically present manifest symptoms of uncontrollable shaking as seen in apoplexy.

Thus, considering the symptoms of uncontrollable shaking, apoplexy is the most relevant diagnosis.