Pound Dog is a term used to describe a STRAY, mongrel, or CUR dog that has been taken to an animal shelter. These dogs are usually found wandering the streets and have not been claimed by an owner. The term 'pound dog' is derived from the fact that these animals are often taken to a pound or animal shelter. STRAY, mongrel, and CUR are all terms used to describe these types of dogs, with STRAY being the most common. A mongrel is a mixed-breed dog, while a CUR is a type of hunting dog.