Which type of knot is commonly used to prevent an animal from coming untied?

The square knot is widely recognized for its effectiveness in tying two ropes together securely. In the context of animal handling, this type of knot is often chosen because it can be tied easily and holds firmly under tension while also being relatively easy to untie after use. It creates a flat, secure knot that remains stable and is less likely to slip as compared to other knots, which is essential when securing an animal to prevent escape or injury.

In contrast, the granny knot, while similar in appearance, is generally less secure and can slip under load, making it a poorer choice for animal restraint. The bowline knot, known for creating a fixed loop at the end of a rope, is great for rescue situations but does not provide the same effective tie-down for preventing escape as a square knot. The figure-eight knot is typically used in climbing and is effective for creating a strong tie, but it is not the ideal choice for securely tying an animal due to its complexity and bulk, which may make it harder to tie and untie efficiently.