What is the origin of the idiom "like a dog with a bone" and when to use it?

The origin of the idiom "like a dog with a bone" can be traced to the innate behavior of dogs and their tendency to become possessive and determined when it comes to bones or other objects of interest. Dogs are known for their tenacity in holding onto bones, chewing on them, and not easily letting go. This natural behavior of dogs has been metaphorically applied to human characteristics, leading to idiomatic expression. This expression is now used informally to highlight someone's tenacity and single-minded focus on a specific matter, whether it is pursuing a personal ambition, advocating for a cause, solving a problem, or asserting a viewpoint.