This would be a good idea for the paddocks so you can better keep their hay from getting eaten off the mud and also don't have to spend a ton of time on hay nets! Although, these should be a bit bigger.
Kid warmer: A 55 gallon FOOD GRADE plastic barrel. Cut a hole the diameter of a heat lamp in the top lid leaving enough to run 4 screws through the rim of the metal lampshade into the top of the barrel. Be sure the bulb won't be touching the plastic. Put a square of chicken wire under the bulb just in case it burst the screen would catch parts. Cut a door with a jigsaw. Secure to stall wall, add straw and babies. It also casts a nice glow for doing barn checks at night.