More than 100 nations have restricted or banned the use of steel jaw traps.

https://www.revealnews.org/blog/more-than-100-countries-ban-this-cruel-trap-the-us-isnt-one-of-them/

They are cruel, and they injure or kill- as in this case- non target species.  Any animal breaking its teeth trying to chew a steel trap off its limb is in great pain.  It is even worse when an animal leaves part of its limb behind.

This is also another reminder that allowing dogs to run free is reckless.