Advantages outweigh disadvantages. Early in the morning, you walk around the zoo ground. I think I learned it from Dr. Koga, of Ueno Zoo in Tokyo. 6:30 in the morning, he lived in a small house inside the zoo. 6:30 in the morning, the door opens, he comes out with camera, notepads, little pieces of bread, walks around, looks at animals. If necessary, he takes pictures, takes notes, throws the piece of bread, looks at the reaction. Makes the round, goes back to his little house. Eats breakfast.
