What is the primary symptom of bumblefoot in hawks?

Bumblefoot is a common ailment in raptors, particularly in hawks, characterized by inflammation and infection of the footpads. The primary symptom of this condition is indeed swelling and sores on the footpads. This occurs due to prolonged pressure, typically from sitting on hard surfaces or from an underlying infection. The sores can lead to more severe complications if not treated, as they can become painful and may impede the bird's ability to perch, hunt, or even walk properly.

The other symptoms listed, such as uncontrollable shaking, poor appetite, and weight loss, can be indicative of other health issues but are not specific to bumblefoot. While a hawk with bumblefoot may experience a decreased appetite or weight loss due to pain and discomfort, the most direct and recognizable symptom is the visible swelling and sores on the footpads. This distinction is crucial for proper diagnosis and subsequent treatment of the bird's condition.