Ruby, one of my rescue cats, began licking seashells that I have in my office awhile ago. I suspected this might be because she was lacking something (seems that salt would be the most obvious answer) but otherwise she seemed fine so I continued feeding her the same food I feed the others. Last week, though, her eating deteriorated and she had a fever. Vet treated her with Orbax, which seemed to help a bit, but as of yesterday she is not even getting up to eat or drink. Must take water and food to her and she barely eats. I'm taking her back to the vet tomorrow as I cannot even get there today because of yesterday's blizzard. Fortunately she is not in pain but I'm horribly worried about her.
I should mention that, when I rescued her, she was truly the most skeletonic creature I have ever seen. I suspect this terrible beginning in life (she was about 8 months old when I got her) contributed to a weak immune system. After I got her healthy, though, she turned just the opposite and is now overweight. She went through a period of having anal gland problems that, ironically, healed about 6 months ago. Now this. Any and all input would be appreciated.