Over the years, we've seen a trend of consistent egg quality issues in our flock. When one of our recently added members, a Prairie Bluebell Egger, started out laying the most beautiful eggs in November, then began showing signs of the same egg quality issues that we had seen with other flock members as time went on, it was time to dig in and figure it out. There was a pattern.
The egg laying issue would first present as sandpaper eggs, however, the egg shell was strong and not thin or brittle. It seemed the hens could possibly be getting too much calcium, so we made the change off of layer feed and to all flock with free choice oyster shell as their primary source of calcium.
After some time on the new feed and free choice oyster shell, there was no improvement. The egg quality was actually getting worse. The sandpaper eggs continued, but now with the addition of thin shells and wrinkles on the end. It was starting to point towards not enough calcium, which wasn't adding up because we have always had our flock on layer feed with access to free choice oyster shells. There was plenty of available calcium in their diet.
Reading through the BYC archives, the one thing that we had not tried was Calcium Citrate + D3. Figured we would give it a try before we chalked it up as a bad egg laying gland and live with the poor quality eggs. There were a lot of posts on BYC on this topic, but not much in the way of outcomes. Did it have an impact or not
With a quick trip to Walgreens, we started giving the Prairie Bluebell Egger the Calcium Citrate + D3 pill orally in the evenings as she was roosting. After 2 days, the egg quality had improved drastically and they continue to improve. Then a lightbulb went off
Even though the State of Colorado gets a crazy amount of sunlight in a given year, half the human population is vitamin D deficient. Apparently it has to do with the angle of the sun. Could this be what is going on with our hens? Vitamin D3 is necessary for hens to process calcium after all.
With that possibility in mind, we've stopped giving the Prairie Bluebell Egger the Calcium Citrate pill and have moved to focusing on D3 levels flock wide to ensure they all have the levels needed to process the calcium they have had access to all along. We've begun giving them a chicken specific layer supplement in their water that contains D3 to see where things go from here. (the supplement does not have calcium as an ingredient)
Another hunch is the light in their coop. We do provide supplemental light on a timer throughout the winter months. It has always been a standard low watt incandescent or LED bulb. Considering testing a low watt full spectrum grow light instead to see if that might help with the low D3 levels during the winter months. I have read a few threads and blog posts on the topic of full spectrum bulbs in the coop, but couldn't find anything with evidence one way or the other.
Anyways, figured I would share our story and little experiment in case it may help someone else down the road. I'll continue to post updates on if the egg quality continues to improve or if we see a decline again.
The egg laying issue would first present as sandpaper eggs, however, the egg shell was strong and not thin or brittle. It seemed the hens could possibly be getting too much calcium, so we made the change off of layer feed and to all flock with free choice oyster shell as their primary source of calcium.
After some time on the new feed and free choice oyster shell, there was no improvement. The egg quality was actually getting worse. The sandpaper eggs continued, but now with the addition of thin shells and wrinkles on the end. It was starting to point towards not enough calcium, which wasn't adding up because we have always had our flock on layer feed with access to free choice oyster shells. There was plenty of available calcium in their diet.
Reading through the BYC archives, the one thing that we had not tried was Calcium Citrate + D3. Figured we would give it a try before we chalked it up as a bad egg laying gland and live with the poor quality eggs. There were a lot of posts on BYC on this topic, but not much in the way of outcomes. Did it have an impact or not

With a quick trip to Walgreens, we started giving the Prairie Bluebell Egger the Calcium Citrate + D3 pill orally in the evenings as she was roosting. After 2 days, the egg quality had improved drastically and they continue to improve. Then a lightbulb went off

With that possibility in mind, we've stopped giving the Prairie Bluebell Egger the Calcium Citrate pill and have moved to focusing on D3 levels flock wide to ensure they all have the levels needed to process the calcium they have had access to all along. We've begun giving them a chicken specific layer supplement in their water that contains D3 to see where things go from here. (the supplement does not have calcium as an ingredient)
Another hunch is the light in their coop. We do provide supplemental light on a timer throughout the winter months. It has always been a standard low watt incandescent or LED bulb. Considering testing a low watt full spectrum grow light instead to see if that might help with the low D3 levels during the winter months. I have read a few threads and blog posts on the topic of full spectrum bulbs in the coop, but couldn't find anything with evidence one way or the other.
Anyways, figured I would share our story and little experiment in case it may help someone else down the road. I'll continue to post updates on if the egg quality continues to improve or if we see a decline again.
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