Originally Posted by
Spanky
As far as medications, I'd not know what exactly to give if her only symptom is loss of appetite and lethargy.
I believe you are familiar with Aspiration Pneumonia (AP) and have ruled that out?
Baytril (vet med) or Cipro (Human Med) could be used if this were AP or even a UTI.
Did you get her from a local pet store?
I'd try to make her cage more comfortable... as Nancy suggested a pile of flannel or fleece squares for her to burrow into and hide in her nest box would be good. I'd place the nest box up higher in the cage or hang a cloth one from the top. Some folks use old stocking caps as hanging nests... you've probably seen different pictures here on the board of these hanging nest cubes.
Putting her cage up higher on a shelf or someplace (safe) might make her more secure... tree squirrels are used to looking down on things, not up (it can terrify them). When alarmed or escaping they go up, up, up. I put wilds I get in for treatment up higher, as high as I can, sine being up higher looking down on me makes them more comfy than looking up at the giant (to them) person.