Hi and welcome from me . I`m sorry to hear about your friends Labrador , but also I`m afraid that I cant offer any Veterinary advice as only a qualified Veterinary answer the questions you are asking , sorry .
Like I said I was asking for a good friend of mine,I feel bad that he is going through this because it is a beautiful puppy and if anyone who has gone through something similar offer some advise , thank you for answering