Help Beans get better

Hey friends, recently my little beans stopped eating and drinking water and is in very critical condition he can no longer hold his stool in or urnine. As for being 4 months old his white blood cells are very low and close to non existent. Doctor has diagnosed him with parvo even though his test came back negative.  He’s taken the parvo shot but unfortunately my baby was one of the ones who couldn’t fight it off.  He’s currently hospitalized until midnight. We’ve already paid close to $1000 and unfortunately don’t have the funds to pay for 2 more nights in the hospital. I appreciate anything that can help me get close to what I need to get him back to being the playful puppy he was even if it’s for a couple more hours or 1-2 days. If I bring him home she said 10% chance of survival rate without being on IVs. Thanks for taking the time to read this prayers are needed right now.