It is the LAW that you have to provide veterinary care for this severely injured puppy
. If you can't do this, how on
earth will you ever afford all the expenses that go along with dog ownership? ONE illness can cost hundreds of dollars.
If you can't afford to raise a dog, then don't adopt one. Too late for you and your unfortunate puppy, though.
Left untreated, the puppy's limb will likely wither and atrophy. He will be in some pain.