Skip to Main Content

For security, click here to clear your browsing session to remove customer data and shopping cart contents, and to start a new shopping session. 

Tractor Supply Co.

We Are Listening...

Say something like...

"Show me 4health dog food..."

You will be taken automatically
to your search results.

Please enable your microphone.

Your speech was not recognized

Click the microphone in the search bar to try again, or start typing your search term.

We are searching now

Your search results
will display momentarily...

Main Content

DuMOR Oyster Shell, 5 lb.

SKU: 100303599
DuMOR Oyster Shell, 5 lb.
Enter Zip Code for price More Info


  • Product availability varies by store.

Product price

Save Up To
See price at checkout More Info
Product Rating is 4.6


Check Availability at Other Stores
Standard Delivery Not Available to 
Notice: This item will ship within 0 days.
This product may require up to 0 additional days for order processing prior to shipping.
Change Delivery Location

Item Information

Builds Strong Chickens and Healthy Eggs

Making egg shells takes a lot of calcium, and some laying hens can create as much as one egg per day. DuMOR Oyster Shell is a calcium supplement designed to ensure your birds lay healthy eggs organically. Offer to your birds in a separate container from their feed and watch as they instinctively take the amount their bodies need to create strong, unblemished eggs.

We Love Chickens and Know Just What Their Bodies Require

Who better to make food for pets than farmers? At Tractor Supply Company, we bring our deep passion for land and animals to the center of our products and services. By sourcing the best local produce, utilizing superior water purification processes and thoroughly testing our formulas, we guarantee excellent quality food for your chickens.

Great for Cleaning Corn Burning Stoves

DuMOR Oyster Shell is also recommended as an additive to promote clean burning in corn burning stoves. Consult your stove's manual to see if oyster shell is recommended for your stove and follow the manufacturer's directions for proper use.

Specification Description
Product Width: 8-1/4 in.
Shop By: Bulk Discount
Product Length: 4 in.
Package Weight: 30 lb.
Brand: DuMOR
Package Width: 9 in.
Package Height: 7 in.
Product Height: 11-1/2 in.
Package Length: 15-1/2 in.
Manufacturer Part Number 06-0696-0236
DuMOR Oyster Shell, 5 lb. is rated 4.6 out of 5 by 82.
Rated 5 out of 5 by from Older girls need Older girls need this while sharing layer feed with our younger chickens. I see them helping themselves. Their production of eggs is still good and the eggshells are strong.
Date published: 2020-07-29
Rated 5 out of 5 by from Easy supplement for layers. As my girls get older I know all that egg laying is depleting their calcium. I add some to their feed and also offer it with grit.
Date published: 2020-07-20
Rated 5 out of 5 by from Strong eggshells Gives the laying females the right amount of nutrients for strong eggshells and healthy reproductive system.
Date published: 2020-06-22
Rated 5 out of 5 by from Egg Quality Helps Egg Quality. Sometimes egg shells become brittle and this does the trick and the girls love it.
Date published: 2020-06-02
  • y_2020, m_8, d_12, h_15
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.10
  • cp_1, bvpage1
  • co_hasreviews, tv_39, tr_43
  • loc_en_US, sid_100303599, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_tractorsupply
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • LOCAL, getContent, 3ms

Can this product be used with Manna Pro Hydro Hen?

Asked by: Mikeyenjoyschickens
Yes this can be used.
Answered by: ErlindaC
Date published: 2019-02-09

It’s safe for rooster? 

Asked by: Bvaldez20
This product is for hens to provide additional Calcium to support strong egg shells. It is unnecessary for roosters. If roosters consume some that is put out for hens, a little won’t hurt them, but excessive intake by roosters should be avoided. This is generally not a practical problem.
Answered by: jessicasm
Date published: 2019-08-09

Can this be used for Parakeets also?

Asked by: Freezer Queen
We would not recommend because the particle size is too large.
Answered by: ErlindaC
Date published: 2020-03-07

What age should you start chickens on oyster shell?

Asked by: K_rogers
The recommendation would be for chickens around 16 weeks of age, right around the onset of laying eggs.
Answered by: jessicasm
Date published: 2019-06-18

Can I feed this to ducks

Asked by: Liz75
Yes, you can add to feed for ducks.
Answered by: ErlindaC
Date published: 2019-02-09
  • y_2020, m_8, d_12, h_15CST
  • bvseo_bulk, prod_bvqa, vn_bulk_3.0.10
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_5
  • loc_en_US, sid_100303599, prod, sort_[SortEntry(order=FEATURED, direction=DESCENDING)]
  • clientName_tractorsupply
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • LOCAL, getContent, 3ms