I'm sorry to hear Daisy has been so sick. Hopefully her numbers will continue to improve and she will be all better soon!
I was curious about the doxycycline and it's side effects.....the "Vary Rare Side Effects" statement was copied from the linked article.
Side Effects of Doxycycline for Dogs | eHow.com
Very Rare Side Effects
5. "The Pill Book Guide to Medication for Your Dog and Cat" notes that the following symptoms rarely happen: the dog becomes more easily easily sunburned, gets liver damage or has changes to blood cells.