The only problem with treating it for everything is I won't actually be able to pin down the actual cause, so I'll be no help to anyone else that experiences this. She does appear to be getting much better. For 2 nights, we had to place her on the roost as she couldn't get up on it herself (and she fell off it in the middle of the night on both nights). Last night, she got on to the roost herself and managed to still be there in the morning. This indicates (well at least to me) that the balance issue is improving. I suppose we'll know one way or another in the next few days. Just have to trust my husband to remember to give her the Amoxyclav tomorrow morning, I start a 24 hour shift this afternoon. I will give it to her just before I leave and the second I get home, but I need that 'in-between' dose in her. Fingers crossed she gets it lol.