Ruby is doing better this afternoon, her fever has broken (36.8C) and her heart rate is down below 110 while sleeping. These are both good signs that the treatments are working. We still don't know for sure if it was an infection, but that's the prevailing theory. It takes 3 days for the cultures to complete, but usually see something after 24 hours if something is there.
She is getting some rest with the increased dose of sedatives and the new medication for her heart seems to be working well too.