We have a small backyard flock of 7 hens (various heavy breeds aged 1-3.)
We feed free choice layer pellets (Blue Seal Organic Life), and offer crushed oyster shell and granite grit free choice. Occasionally they get a handful of scratch or leftovers. They free range in the yard all day, too, and I know they are eating a lot of forage.
We had some extremely warm (unseasonable and fairly sudden) weather a week or so ago. Nothing else has changed (no diet change, etc.) except that for the last week -since I found the first thin-shelled egg- I have been mixing oyster shell right into their food as well as offering it free choice as usual. So, if anything I'd think they were getting a LOT of calcium. (This bag of oyster shell is a year old, but I don't believe it has a shelf life, does it?)
All of a sudden, at least 3 of our hens are laying very thin-shelled eggs. I have found a couple on the droppings board under the roost in the morning, a couple on the floor, and a couple in the nest box, broken and sometimes eaten! This is all very strange. Until now we've had only thick-shelled eggs and everyone except one hen lays routinely in the nest boxes.
I looked in the "chicken health handbook" and read about Vitamin D deficiency, that it can sometimes be precipitated by unusually hot weather. So I thought, oh, that must be it! But then I read that TOO MUCH Vitamin D can cause those pimply calcium deposits.... and I know that one hen has been having those deposits for at least 4 months. So--- now I am thoroughly confused as to the cause. And worried, since it's affecting so many of them!!!
Today I ground up some eggshells and mixed it with a little chick feed and water and fed it to them as a "treat", hoping that might help some.... but I really want to know what to do next.
Anyone?
We feed free choice layer pellets (Blue Seal Organic Life), and offer crushed oyster shell and granite grit free choice. Occasionally they get a handful of scratch or leftovers. They free range in the yard all day, too, and I know they are eating a lot of forage.
We had some extremely warm (unseasonable and fairly sudden) weather a week or so ago. Nothing else has changed (no diet change, etc.) except that for the last week -since I found the first thin-shelled egg- I have been mixing oyster shell right into their food as well as offering it free choice as usual. So, if anything I'd think they were getting a LOT of calcium. (This bag of oyster shell is a year old, but I don't believe it has a shelf life, does it?)
All of a sudden, at least 3 of our hens are laying very thin-shelled eggs. I have found a couple on the droppings board under the roost in the morning, a couple on the floor, and a couple in the nest box, broken and sometimes eaten! This is all very strange. Until now we've had only thick-shelled eggs and everyone except one hen lays routinely in the nest boxes.
I looked in the "chicken health handbook" and read about Vitamin D deficiency, that it can sometimes be precipitated by unusually hot weather. So I thought, oh, that must be it! But then I read that TOO MUCH Vitamin D can cause those pimply calcium deposits.... and I know that one hen has been having those deposits for at least 4 months. So--- now I am thoroughly confused as to the cause. And worried, since it's affecting so many of them!!!
Today I ground up some eggshells and mixed it with a little chick feed and water and fed it to them as a "treat", hoping that might help some.... but I really want to know what to do next.
Anyone?
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