I recently purchased a newborn calf from a sales barn. The first 3 days she seemed fine, on the forth day her back legs got week. On the fifth day she was down. We treated her with electrolytes and antibiotics, during her down time she also got pnemonia. She went blind on the 3rd day into her illness. After 1 week of treatment I started working her to get her to stand. She made some very limited progress where she could stand for moments and even try to walk, but on the 9th day she worsened and could no longer stand. Joint ill comes to mind, any other ideas?