Manna Pro Crushed Oyster Shell Calcium Supplement For Laying Chickens, Poultry Treat, 5 lbs
Original price was: $9.99.$7.64Current price is: $7.64.
Price:
(as of Mar 28, 2025 22:24:18 UTC – Details)
Whether you own a backyard flock or raise champion birds, we know how fulfilling it is to check your nesting boxes and find perfect, beautiful eggs. Avoid cracked or broken eggs with Manna Pro® Oyster Shell. Effective and convenient, it helps reduce the number of weak, soft or broken shells by naturally adding calcium to your flock’s diet. It’s as simple as that! Add Manna Pro Oyster Shell to your mix and enjoy finding gorgeous eggs every time!
Is Discontinued By Manufacturer : No
Product Dimensions : 4 x 8.33 x 11.5 inches; 5 Pounds
Manufacturer recommended age : 1 month and up
Item model number : 1000210
Date First Available : January 2, 2007
Manufacturer : TV Non-Branded Items (Pets)
ASIN : B000MD59TC
Country of Origin : USA
FOR LAYING POULTRY: Our crushed oyster shells are crafted to provide essential calcium for all laying poultry including chickens, ducks, and quails; from backyard flock to commercial farms, our product is the perfect addition to your chicken feed
OYSTER SHELL & CORAL CALCIUM: Our chicken oyster shells are made from a blend of crushed oyster shells and coral calcium, ensuring that your poultry receive a high-quality source of chicken calcium that is easily digestible
STRONGER EGGSHELLS: Our crushed oyster shells are an excellent source of calcium for chickens, providing the necessary nutrients for proper eggshell formation, resulting in high-quality eggs and a healthier flock overall
HEAT TREATED FOR PURITY:Our oyster shells for chickens are heat treated to ensure maximum purity and cleanliness; our crushed oyster shells for chickens are free from harmful contaminants, bacteria and pathogens, making it safe for your poultry to consume
MADE IN USA: Our chicken food is proudly made in the USA, using only the finest ingredients; by choosing our crushed oyster shells for chickens, you’re ensuring your birds receive a high-quality, domestically made product that you can trust
Customers say
Customers find the product to be a good quality and value for money. It helps produce strong eggshells and provides a good amount of calcium. Many customers appreciate the quality of the eggs and the hard shells. However, some have differing views on chicken health and size.
AI-generated from the text of customer reviews

Original price was: $9.99.$7.64Current price is: $7.64.
shopper222134 –
Works in fishtanks aquariums.
My water is really soft, so I wanted to use it for my fishtanks. I put them in mesh bags to to keep everything thing clean. Plecos and shrimp seem to be happy and everything is stable. Its been a few months and nothing has died so I think it will work well in your aquariums. WILL use again 100% 3-2025
Nyla –
What I expected
This came just as I expected and my chickens love it. Itâs a good value for your money
Eeilee –
Best price here on Amazon
I offer these to my girls in a bin in their coop in case they need extra calcium.They know when they need it and will eat it when needed.Offers the appropriate amount of calcium unlike egg shells or other things I have tried.The price on Amazon is 2 dollars cheaper than any of the feed stores I have looked at.Will continue to order as needed.
Samantha Wojtynek –
Product is as described
Quickly delivery, product is as described, good price.
Aimee –
Good for Chickens, NOT for Quail
This would be good for Chickens. However not so good for Quail. The crush size is too large for Quail. I have tried to reduce the crush size by blender, which did not work, and then bagging it and whacking it with a hammer MANY times, which also did not work. Holy cow, oyster shell is strong!
emil –
Good quality calcium for your chickens
This is a good quality product, so you can make sure your chickens are getting enough calcium. So, if your chicken’s shells are too thin or worse, always have a bowl of this available for your chickens to eat as needed.
Vicki –
Great Addition To Chicken Feed
The oyster shells were a great addition to the chicken feed. The chickens love it!
Dale Denmon –
Only the best for my chickens!
I love the convenience of ordering these oyster shells for my girls! I dump it right in with their food to keep the eggs hard and keep my chickens healthy! Thanks Amazon for making it so easy!!
nicki –
Itâs so much bigger than I expectedMy chickens havenât touched it yet
Annouck –
Para fortalecer cascaron de blanquillo de gallina y aves de distribución sencilla ya sea solo o en el alimento combinando
Alex De Anda –
Al principio no lo comÃa porque le costaba trabajo desbaratarlo, pero lo moli un poco y le gusta mucho. Esta poniendo buenos huevos