The coconut oil won't go rancid, it's actually mildly antibacterial. If you can, I'd try to get a tsp to a tbsp into her each time. That she's having solids in her droppings again is a very good sign, as well as seeing more normal behavior. I would give it a week and then see how she's doing. If it was a parasite issue, then it could take that long. If you want to give probiotics (human ones or animal ones) that might be helpful also to get the gut back in balance. You can empty a capsule, or mix the powder into a bit of moistened feed. Fingers crossed she continues to improve!