What is the origin of the idiom "go to the dogs" and when to use it?

The idiom "go to the dogs" has its origins in ancient Greece, where dogs were considered to be unclean animals that roamed the streets. The phrase refers to a situation or thing that is deteriorating or declining, often in a moral or ethical sense. It is often used to describe situations where something that was once good or well-respected is now in a state of disrepair or disrepute.