“We start off with an oil bath,” Gerspacher said. “The easiest way to get that tacky substance off of their feathers or skin is to use oil … vegetable oil, canola oil. We use that, avoiding their eyes, of course, and just soak the bird, and work that oil into their feathers.”
After getting a good soaking in oil, the caretakers bathed the owl with Dawn dish soap and water. While Gerspacher doubts the owl enjoyed any of this, she could tell that he felt better afterwards.