I have 2 adult hens, how much should they be given per day or week?

Put a bowl or dish with it out for them. Hens are very in tune with their body and know when they need calcium. Refill as often as needed.

Is this too large for vermi-composting. Will worms eat it?

If worms eat oyster shell and calcium they would eat this, it's good quality rock.

Hi can i feed baby chiks?

You don't want to feed this to baby chicks. Only when they start laying eggs. Only feed medicated chick feed. You can add chick and grit later when there are about 8 weeks old. But do not mix the grit in with their feed. The oyster shell is to help with the calcium needed to create eggs. So do not give that until they are laying.

Where is this from USA ?

I can’t find anywhere on the package a country of origin. MannaPro is from St. Lewis, but the bag says manufactured for MannaPro.

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Manna Pro Crushed Oyster Shell for Chickens, Calcium Supplement, 5 lb Bag

Product ID: 4312710

Details

Age Range (Description)
All Life
Brand
Manna Pro
Flavor
Egg
Item Form
Pellet
Specific Uses For Product
Outdoor

🐚Premium crushed oyster & coral calcium blend

🔥Heat-treated for purity & safety

🥚Supports stronger, high-quality eggshells

$67.40

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Description

🥚 Elevate your flock’s eggshell game with nature’s pure calcium boost!

CLEAN SAFE NUTRITION - Heat-treated oyster shells eliminate contaminants for worry-free feeding.
VERSATILE FOR ALL POULTRY - Perfect for chickens, ducks, quails—backyard flocks to commercial farms.
SELF REGULATED FEEDING FREEDOM - Allows hens to control calcium intake, preventing soft shells and promoting health.
CALCIUM POWERHOUSE FOR PEAK LAYERS - Optimized slow-release calcium boosts eggshell strength and laying performance.
MADE IN THE USA TRUSTED WORLDWIDE - Premium domestic sourcing ensures consistent quality and reliability.

Manna Pro Crushed Oyster Shell is a premium, heat-treated calcium supplement made from a blend of crushed oyster shells and coral calcium. Designed specifically for laying poultry, it provides a slow-release, natural calcium source that supports strong eggshell formation, improved egg quality, and overall bird health. Suitable for all poultry types and life stages, this 5 lb bag offers a clean, safe, and domestically made solution trusted by backyard keepers and commercial farms alike.

Specifications

ASIN	B000MD59TC
ASIN	B000MD59TC
Additional Features	Heat-treated for purity
Age Range Description	All Life Stages
Allergen Information	Celery Free
Best Sellers Rank	#12,546 in Pet Supplies ( See Top 100 in Pet Supplies ) #189 in Bird Food
Brand Name	Manna Pro
Breed Recommendation	All Breed Sizes
Container Type	Bag
Customer Reviews	4.7 4.7 out of 5 stars (15,879)
Date First Available	January 2, 2007
Flavor	Egg
Global Trade Identification Number	00095668069629
Is Discontinued By Manufacturer	No
Item Form	Pellet
Item Type Name	Bird Food
Item Weight	5 Pounds
Item model number	1000210
Manufacturer	TV Non-Branded Items (Pets)
Manufacturer	TV Non-Branded Items (Pets)
Manufacturer Part Number	1000210
Manufacturer recommended age	1 month and up
Model Number	1000210
Number of Items	1
Occasion	Birthday
Package Size Name	5 lb Bag
Pet Type	Bird
Product Benefits	Supports strong eggshell formation in laying hens
Product Dimensions	4 x 8.33 x 11.5 inches; 5 Pounds
Recommended Uses For Product	Poultry egg-laying support
Special Ingredients	Oyster Shell
Specific Uses For Product	Outdoor
Target Species	Chicken
UPC	095668069629
Unit Count	5 Pounds

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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Excellent communication throughout the order process. Product is perfect.

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$67.40

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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