Hopefully I can give you some info, I was a vet tech for 12 years, the sock and duct tape is a great bandage, you sould cut the nail back as far as possible to keep it from catching on things, the nail its self may fall off leaving the quick exposed, it will look like a little pink pointed finger for lack of better description, well I could describe it to the "t" but would prpbably get kicked off the boards, anyway then a new nail will grow back this takes several months sometimes for a new nail to come completely in,, If you have trouble keeping bandage on cut the bottom from a bucket and put over dogs head tie the bucket to his collare KFC chicken buckets work great for this, Also for future reference corn starch or flour work great to stop the bleeding corn starch better or blood stop powder from dehorning and castrating cattle also works too. Any antibotic ointment is good for a few days baut you want that to dry and harden so dont keep it too gooped up the torn nails rarely get infected, the biggest thing is the dog will sometimes drive you and himself crazy licking at the nail, again the bucket works cause he cant get his tongue to the toe good luck