If you are looking for a dog of hunting pedigree, it’s often difficult to predict by just examining a cute lil puppy. You will pay triple the price for a pup that will grow into a fine hunting dog due to its lineage.
Under closer examination you may discover the puppy is actually sickly, hobbled, and didn’t respond properly to sounds or smells. The pup is only good as a house dog. You would tell the seller that your not interested in his puppy because “that dog won’t hunt.”
Translation: “I’m not buying what you’re selling, it’s of no use.”
Thanks :) Cool saying.