Thank you everyone for your purrs, it really helped!!
For much of Sunday Odyssey's temperature continued to rise and she refused to eat. More sub-q fluids.
The rescue group I volunteer with, has a vet who makes herself available when there's a need. So, thankfully, she has been advising the treatment of little Odyssey. She was given a shot of something to help reduce her fever so that she might start eating. Well, I think it worked.
Later on Sunday, her temperature had fallen and by evening she was at her normal temperature, 100.3°F (37.9°C) and she was back to eating like a miniature horse with lots of kitten-energy!
This morning, she is still enthusiastically eating, although her temperature has climbed a little, 101.8°F (38.8°C). We were so relived to have her temperature drop last night and for her to return to her normal kitten-self. We'll keep nursing her along. I'm not sure I'm ready to say we are out of the woods quite yet, but I sure hope so.