My buddy may be dying

Years ago I use to take my Husky puppy to the local dog park in hopes of socializing him... What really happened is he got attacked by a couple Boxers... I said something to the owner & he tells me it's part of a puppy growing up.... Eight months later my Husky has gotten much bigger & much stronger... He picks a fight with the guys boxers & shreds one of them pretty good, the other one runs off... Guy threatens to shoot my dog... I told him it's just part of dogs getting older & let him know that if he wants to shoot my dog he'd best be behind cover cause I don't shoot dogs...