I hope your not adding the vitamins and polivisol together . Excess selenium will kill birds quicker than as deficiency will. Calcium carbonate is also best placed in a dish on ' freetake ' that way the birds that need it will partake and those that don't aren't getting too much calcium in their system, which once again can be lethal once it has made its way into the organs.
Thx for the input. Nope, the Rooster Booster chicken vits are mixed sparingly (per instructions) into their cooked organic brown rice, mixed with a sparing sprinkle of Brewers Yeast, Selenium, and Bee Pollen. I read up on these before incorporating into their diet. The Poly-Vi-Sol is used 1 to 2x a week as supplementation for a broody or a molting hen eating poorly, or a layer with high production, one drop on the side of the beak -- or in the case of the Silkies they lick up the drop right off the dropper or out of the palm of my hand. And the Calcium Carbonate is placed next to the Oyster Shell so the laying birds have a choice. It's good you point these things out since I sometimes leave out the details when sharing
