Our Daisy had parvo as a puppy. not as young as your Serenity though. It itook three days but after plasma and blood she came through it. My prayers and thoughts are w/ you . There is alot more they know about parvo in the 14 years since Daisy had it.
GSD Rescue 2/16/2002
Thunder from the East: adopted 1/25/2013
Miss Chevy Cruz - adopted 1/25/2013