kittydoc
Songster
@EurekaChic You are never at risk of over-informing me! Since this stuff is fertilizer, I doubt it contains lead. The magnesium content was <1%, so anything else is definitely trace minerals. When you consider all the little rocks and so forth that chickens consume all the time to replace the grit in their gizzards, I'm not too concerned that it is not food grade. I don't think any of the calcium carbonate supplements we put out for our birds are human food grade. That would make it prohibitively expensive for a flock.
The product I purchased has a pellet size about 1/5 to 1/10 the size of an average piece of oyster shell calcium, with the rest even smaller, down to a powder. I put a little in my own mouth to check it out, and it dissolved in less than a minute. I know a piece of oyster shell wouldn't do that.
I do think I will start by putting the new high CaCO3 product in a self-feeding container next to the oyster shell, and see how it is received. I am aware of the adverse effects of excessive calcium (or any mineral) in birds or mammals. If I ever added it to our current layer feed, I'd have to pull out my animal nutrition math and see how much I could safely add without exceeding the maximum recommended value of calcium for layers. I find it odd that the layer feeds are all labeled "complete," yet every single book on poultry says we need to leave out a source of extra calcium for the birds to eat ad lib. That just seems contradictory to me.
Getting back to the calcium, we have kale growing in the garden now, and whenever I can get kale inexpensively, we give that as a treat as well. Most of our garden actually consists of "bird treats," like tomatoes, cucumbers, and squash. We also are trying to grow some cauliflower for winter. I've never had any luck growing broccoli for some reason....
The product I purchased has a pellet size about 1/5 to 1/10 the size of an average piece of oyster shell calcium, with the rest even smaller, down to a powder. I put a little in my own mouth to check it out, and it dissolved in less than a minute. I know a piece of oyster shell wouldn't do that.
I do think I will start by putting the new high CaCO3 product in a self-feeding container next to the oyster shell, and see how it is received. I am aware of the adverse effects of excessive calcium (or any mineral) in birds or mammals. If I ever added it to our current layer feed, I'd have to pull out my animal nutrition math and see how much I could safely add without exceeding the maximum recommended value of calcium for layers. I find it odd that the layer feeds are all labeled "complete," yet every single book on poultry says we need to leave out a source of extra calcium for the birds to eat ad lib. That just seems contradictory to me.
Getting back to the calcium, we have kale growing in the garden now, and whenever I can get kale inexpensively, we give that as a treat as well. Most of our garden actually consists of "bird treats," like tomatoes, cucumbers, and squash. We also are trying to grow some cauliflower for winter. I've never had any luck growing broccoli for some reason....