Here is one I learned the hard way. Always keep some B-complex on hand, and do NOT keep it in the refrigerator. B-complex should be kept at room temperature, or it will be ruined.
Last year I had an alpaca go down. We could find nothing wrong with her. After a quick call to Steve Hull, he suggested we give her a shot of B-complex. (The amount does vary depending on the B-complex.) Amazingly within a short time she was up, and acting much better. We continued giving her the B-complex shots, as instructed by Steve. I really believe this saved her life.
The issue was caused by a fungus that is prevalent certain times of the year. It inhibits the absorption of B vitamins.
Mountain Ash Farm