I was thinking about soaking my feet in Epsom salts.  Then I saw this about using Epsom Salts in the garden.  So I think I'll fill a large bucket, and soak my feet outside.  Then I put the water, with the epsom salts in it onto my plants.  
....Experienced gardeners use Epsom Salt as a tonic for plants. It supplies readily available Magnesium and Sulphur which are easily leached from the soils by rain. This tonic is particularly useful when the lack of nutrients in the soil is causing yellowing of the leaves. Not only does Epsom Salt provide good nutrition, but it also improves plants utilisation of N(nitrogen) P (phosphorous) and K (potassium) making it the perfect partner for your current fertilising plan.
Supplementing with Epsom Salt supports
    germination
    foliage and flower development
    chlorophyll production
    and improved absorption and use of phosphorous and nitrogen.
The major pluses of using Epsom Salt:
    it’s natural
    it does not build up in the soil and cause any problems
    it is safe around pets and children
    it is quick acting
    clean and odour free
    over application does not cause damage or burning of plants.
   
  Why not start with an IBC and cut a hole for the door?  You could build closed laying boxes into it, and something for the chickens to roost on.  Put some straw or saw dust on the floor.  You could add vents to the side for air.  If it sat inside a chicken run that you can walk into, the chickens could be safe, dry and happy.  I have an extra IBC.  Maybe this could be my chicken house? I bet I could even plant the outside of it with mud and grass for extra insulation and good looks.  
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