I've seen a goose chase a pit bull, but I've also have seen a goose taken out by a dog. I imagine a full grown coyote could take out a goose. A swan might take out a coyote, though. They can hit hard enough with their wings to break a person's leg! Swans are basically big, meaner, geese.

In the non-avian sector, llama's have been known to stomp coyotes to death. Some sheep herders now keep a few llamas with their sheep. The llamas are quite protective of the sheep (they think the sheep are baby llamas?) - Granny:hippy: