oh dear, im so sorry, illness is such a pain. to be honest i would just ride out the illness, do whatever you can do and just focus on getting everyone better then get back on track when you feel you are all able to. I know its hard, I hate the effect illness has too. I wouldnt bring the DF back in, we have had illness after dropping the DF and it makes no difference, consider the DF ancient history now. as for 16oz just let him take that much, i know when im sick i cant be bothered eating much, just try getting water into him as much as possible, that will be the best way to flush out the sickness. He will catch up on eating eventually.
as for the tooth do you elevate teh mattress? when they lie down the pain radiates to their ears so having the mattress elevated helps ease the pain.