Failure to thrive

[nachosmama]

So my RIR is still the same. I've been racking my brain for the last 3 days trying to figure out what's wrong with her. I've been giving her water with corid in the water feeder and corid drenches. Her main symptoms are: hunched up looking with her head tucked in, sleeping a lot, anemic, and loosing weight. I see her scratching around occasionally but not drinking. I also don't see any mites or lice. Any ideas why shes sick? What should I do? She was 17.2 oz two days ago. Now she's 16.6 oz. she's so little