I agree with Danz, I couldn't tell you how many times on BYC the question is asked about providing heat to birds, but wild birds survive just fine without supplemental heat. The down layer of their feathers keeps them warm and makes them far more cold hardy than heat hardy. What they really need is fresh air. More coop fires are started every year by well-intentioned people running heat to their coops when it wasn't needed in the first place.
I don't heat my coop at all. I have year round ventilation via the vaulted roof and open soffits. My windows face east and west since the prevailing KS winds are almost always from the north and south. I put storm windows in the two window openings but never close them all the way. I have never lost a bird to cold and the only time I see them looking unhappy with a low temperatures is when it is in the single digits. Today was just "business as usual" for them (even though I was being a wimp and really feeling the cold today).
As for the difference between drafts and ventilation. I see drafts as being air flow that places air blowing directly over the birds, whereas ventilation is allowing for free air flow, to allow the ammonia to be vented out and replaced by fresh air.
I like your description HEChicken of drafts vs ventilation.
Speaking of bird health I found this "recipe" on one of the sites on FB & thought I would share it. It has a lot of ingredients, but I thought it was interesting.
My mineral mix for chickens
brewers yeast :
Brewer's yeast is used for diarrhea, the common cold and other upper respiratory tract infections, influenza, loss of appetite, It has also been used as a source of B vitamins, chromium, and protein.
Garlic granules: Packed with antioxidants, immune system could benefit if you give it a constant boost of powerful garlic in daily recipes. Proven anti inflammatory
Anti fungal properties
Natural fly repellant
Dried Mint: very palatable
Limestone flour: rich source of calcium
Oyster grit: helps hens to form good shells by extra calcium & also aiding in the digestion
Seaweed meal: used as a trace mineral supplement ( only need about 1 teaspoon per batch of 1.5kg as can cause iodine toxicity)
Phosphorus in the form of soy bean :
healthy bones, better digestion & excretion, more energy, fertility, proper cell reproduction, mental health
Potassium: Potassium is a mineral that's crucial for life. Potassium is necessary for the heart, kidneys, and other organs to work normally.
1 tea spoon should treat 15 birds food for the day
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