CJ, a number of years ago when we lived in Houston, our little Dachshund was bitten by a copperhead snake.
She was bitten on her nose and was swollen so bad she had trouble breathing by the time we got her to the vet.
I don�t recall the treatment but she recovered within a couple of days.
There was a wooded area behind our house and copperheads were common � that little dog turned into a vicious snake killer and afterwards, the only good snake was a dead snake.
She would grab a snake and toss in the air until the snake was dead.
Hope your dog recovers quickly � she may also be a snake killer.