Sour crop in raptors is primarily the result of what factor?

Sour crop in raptors occurs when there is a buildup of undigested or decomposing food in the crop, leading to fermentation and the production of abnormal acids. This condition is primarily caused by feeding the bird food that is not fresh, or that has started to decompose. When raptors ingest decomposing food, the natural digestion process is hindered, resulting in regurgitation, foul odors, and other symptoms associated with sour crop.

While other factors can contribute to general digestive issues, they do not directly lead to the specific condition of sour crop as effectively as feeding decomposing food does. Ensuring that raptors are fed fresh, properly prepared food is essential to maintaining their health and preventing this serious condition.