My puppy is being treated for parvo at home. its been 6 days since the sypmtoms are present. when will he eat?

I am giving sub Q fluids on his back with vitamin b12 in it. He is getting parvaid and pedialyte orally every 4 hours along with anti nausea meds and antibiotics. He was throwing up bad until last night when the doc said increase his dose on nausea stuff. I forced chicken broth orally a few tablespoons. Just did the broth last night. I hope he survives he is a lab rott mix I got in phelan ca on the 30th of december.