Skip to main content
HalloweenPetLawn & GardenTruck & AutomotiveSporting GoodsHorseFarm & RanchClothingLivestockPet & Animal PharmacyToolsPoultryFencing & GatesHome ImprovementOutdoor LivingHeating & CoolingHome Decor & FurnitureOutdoor Power EquipmentTrailers & TowingBoots & ShoesWild Birds & WildlifeToysGift CardsServices Propane RefillTrailer RentalGarden CenterFeed CenterSame Day DeliveryPetVet ClinicPet WashGrooming at PetsenseDog Training at PetsenseTractor Supply RxPet InsuranceWag!

"Savings and Offers"

Weekly AdSaleClearance

"More Options"

Weekly AdWhat's NewTractor Supply AppEarn Rewards with Neighbor's ClubHometown HeroesLife Out Here BlogTSC Exclusive BrandsTop BrandsClearance ItemsBattery FinderOutdoor Power Equipment Parts FinderHitch Finder

Spend $49.99 to unlock Free Delivery on most orders

|
Learn More
Order statusTSC Credit CardsWhat’s newPetsenseWeekly Ad
​

Sign In / Enroll

Get rewarded!

​
Menu

Search

Home

Sign In

Cart
5.0
(1)
5.0 out of 5 stars. 1 review
A woman outside with a dog
A woman outside with a dog
  1. Home
  2. /
  3. Horse
  4. /
  5. Horse Health & Wellness
  6. /
  7. Horse Supplements
  8. /
  9. Horse Vitamins & Minerals
  10. /

  11. McTarnahans Iodide Powder Horse Supplement, 20 lb.

  1. Home
  2. /
  4. /
  5. Horse Vitamins & Minerals

McTarnahans Iodide Powder Horse Supplement, 20 lb.

McTarnahans McTarnahans Iodide Powder Horse Supplement, 20 lb.
McTarnahans McTarnahans Iodide Powder Horse Supplement, 20 lb.
McTarnahans McTarnahans Iodide Powder Horse Supplement, 20 lb.
McTarnahans McTarnahans Iodide Powder Horse Supplement, 20 lb.
Shop all McTarnahans
McTarnahans Iodide Powder Horse Supplement, 20 lb.

Item # 1704076

Size: 20 lb.

Available promotions

Bulk Discount Buy 20 Get 5% off Each. Add to the cart to see the discount. ...

Learn More

Save 5% on your first Smart Supply Delivery order. Maximum savings of $50. First order discount on qualifying new Smart Supply orders. Terms apply. ...

Learn More
Subscription options

$9499

$4.75/lb.

$9999

Save$500(5%)

Save 5% today and on all future orders

Pickup or delivery when it works for you, plus free delivery on orders over $49.99.

Skip, modify, or cancel anytime.

$99.99
$5.00/lb.

Add this item to unlock free delivery!

This item is available online only

Delivery to

​
Neighbor's Club logo
Neighbor’s Club Members earn points with purchases.

Sign in or Join Now

Shop all McTarnahans
McTarnahans Iodide Powder Horse Supplement, 20 lb.

Item # 1704076

McTarnahans McTarnahans Iodide Powder Horse Supplement, 20 lb.
McTarnahans McTarnahans Iodide Powder Horse Supplement, 20 lb.
McTarnahans McTarnahans Iodide Powder Horse Supplement, 20 lb.
McTarnahans McTarnahans Iodide Powder Horse Supplement, 20 lb.
Available promotions

Bulk Discount Buy 20 Get 5% off Each. Add to the cart to see the discount. ...

Learn More

Save 5% on your first Smart Supply Delivery order. Maximum savings of $50. First order discount on qualifying new Smart Supply orders. Terms apply. ...

Learn More

Size: 20 lb.

Neighbor's Club logo
Neighbor’s Club Members earn points with purchases.

Sign in or Join Now

Shop all McTarnahans
McTarnahans Iodide Powder Horse Supplement, 20 lb.

Item # 1704076

McTarnahans McTarnahans Iodide Powder Horse Supplement, 20 lb.
McTarnahans McTarnahans Iodide Powder Horse Supplement, 20 lb.
McTarnahans McTarnahans Iodide Powder Horse Supplement, 20 lb.
McTarnahans McTarnahans Iodide Powder Horse Supplement, 20 lb.

Size: 20 lb.

Available promotions

Bulk Discount Buy 20 Get 5% off Each. Add to the cart to see the discount. ...

Learn More

Save 5% on your first Smart Supply Delivery order. Maximum savings of $50. First order discount on qualifying new Smart Supply orders. Terms apply. ...

Learn More
Neighbor's Club logo
Neighbor’s Club Members earn points with purchases.

Sign in or Join Now

An iodide feed supplement with a palatable dextrose base. To be used as an aid in correcting deficiencies where the use of iodide is indicated. Dosage: Mix 1 oz. with feed daily. MADE IN AMERICA.

    Dextrose Ethylenediamine dihydroiodide (EDDI)

    Ingredient%
    Calcium (Ca)21.5%
    Iodine (I)0.06%
    Salt (NaCI)73.0%

    Feed 1 ounce daily mixed in grain or feed. Use continuously or as directed by a veterinarian.

    Week 1: Introduction Phase Mix 1/4 ounce (1 tbsp) with feed once daily. Monitor for any signs of refusal or sensitivity. Week 2: Adjustment Phase Increase to 1/2 ounce (2 tbsp) daily if no issues arise. Continue mixing thoroughly into feed to prevent sifting. Week 3+: Maintenance Phase Increase to the full recommended dosage of 1 ounce per day. Maintain this level unless otherwise directed by a veterinarian.

    BrandMcTarnahans
    Country of OriginMade in USA
    FlavorNone
    Manufacturer BrandMcTarnahans
    Product FormPowder
    Size20 lb.
    Manufacturer Part Number10581-20LB
    No questions have been asked about this product.

    No questions have been asked about this product.

    Q&As

    No questions have been asked about this product.

    No questions have been asked about this product.

    Similar Items

    1. Top Rated
      McTarnahans Iodide Powder Horse Supplement, 4 lb.
      5.0 out of 5 stars with 2 reviews
      5.0 (2)

      McTarnahans Iodide Powder Horse Supplement, 4 lb.

      $34.99
    2. Top Rated
      Kent Omegatin Horse Supplement, 20 lb.
      4.8 out of 5 stars with 78 reviews
      4.8 (78)

      Kent Omegatin Horse Supplement, 20 lb.

      $34.99
    3. Manna Pro Pelleted Horse Performance Supplement, 20 lb.
      4.3 out of 5 stars with 25 reviews
      4.3 (25)

      Manna Pro Pelleted Horse Performance Supplement, 20 lb.

      $26.99
    4. Manna Pro Sho-Glo Pelleted Horse Supplement, 5 lb.
      4.7 out of 5 stars with 71 reviews
      4.7 (71)

      Manna Pro Sho-Glo Pelleted Horse Supplement, 5 lb.

      $16.99
    5. Purina Free Balance 12:12 Vitamin and Mineral Horse Supplement, 25 lb. Bag
      4.7 out of 5 stars with 197 reviews
      4.7 (197)

      Purina Free Balance 12:12 Vitamin and Mineral Horse Supplement, 25 lb. Bag

      $47.99
    6. Spectra Ultra-Sel Horse Supplement, 64 oz.
      0.0 out of 5 stars with 0 reviews
      0.0 (0)

      Spectra Ultra-Sel Horse Supplement, 64 oz.
    7. DuMOR Vitamin Gold Premium Pelleted Vitamin and Mineral Horse Supplement, 10 lb.
      4.7 out of 5 stars with 93 reviews
      4.7 (93)

      DuMOR Vitamin Gold Premium Pelleted Vitamin and Mineral Horse Supplement, 10 lb.

      $34.99
    8. Elevate Se Vitamin E and Selenium Supplement for Horses, 2 lb.
      4.3 out of 5 stars with 35 reviews
      4.3 (35)

      Elevate Se Vitamin E and Selenium Supplement for Horses, 2 lb.

      $71.99
    9. DuMOR Sand-Aid Pelleted Psyllium Horse Supplement, 10 lb.
      4.7 out of 5 stars with 68 reviews
      4.7 (68)

      DuMOR Sand-Aid Pelleted Psyllium Horse Supplement, 10 lb.

      $72.99
    10. OrthoEquine Wow Oil Energy and Omega-3 Horse Supplement
      0.0 out of 5 stars with 0 reviews
      0.0 (0)

      OrthoEquine Wow Oil Energy and Omega-3 Horse Supplement

      $54.99
    11. Kent Equine Choice Turnout Horse Supplement, 250 lb.
      0.0 out of 5 stars with 0 reviews
      0.0 (0)

      Kent Equine Choice Turnout Horse Supplement, 250 lb.

      $249.99
    12. Kent Equine Choice Turnout Horse Supplement, 33.3 lb.
      4.6 out of 5 stars with 219 reviews
      4.6 (219)

      Kent Equine Choice Turnout Horse Supplement, 33.3 lb.

      $46.99

    Items You May Like

    1. Top Rated
      McTarnahans Durex 7% Tincture Iodine Livestock Wound Care, 16 oz.
      4.8 out of 5 stars with 8 reviews
      4.8 (8)

      McTarnahans Durex 7% Tincture Iodine Livestock Wound Care, 16 oz.

      $24.99
    2. Top Rated
      Durvet Triodine-7 Livestock Supplement, 16 oz.
      4.8 out of 5 stars with 332 reviews
      4.8 (332)

      Durvet Triodine-7 Livestock Supplement, 16 oz.

      $28.99
    3. Top Rated
      Formula 707 Glo-N-Go Liquid Fat Horse Supplement, 1 gal.
      4.8 out of 5 stars with 5 reviews
      4.8 (5)

      Formula 707 Glo-N-Go Liquid Fat Horse Supplement, 1 gal.

      $54.99
    4. Equine One Hoof Mender Putty, 18 oz.
      0.0 out of 5 stars with 0 reviews
      0.0 (0)

      Equine One Hoof Mender Putty, 18 oz.

      $35.99
    5. Farnam Companies Vita B-12 Crumbles, 3 lb.
      0.0 out of 5 stars with 0 reviews
      0.0 (0)

      Farnam Companies Vita B-12 Crumbles, 3 lb.

      $15.49
    6. Neogen Stress Dex Electric Electrolyte Horse Supplement Powder, 4 lb.
      4.7 out of 5 stars with 79 reviews
      4.7 (79)

      Neogen Stress Dex Electric Electrolyte Horse Supplement Powder, 4 lb.

      $24.99
    7. Farrier's Magic Mineral Comprehensive Equine Supplement, 10 lb. Bag
      4.2 out of 5 stars with 5 reviews
      4.2 (5)

      Farrier's Magic Mineral Comprehensive Equine Supplement, 10 lb. Bag

      $49.99
    8. Purina Wind and Rain All Season 4 Availa Cattle Mineral, 225 lb. Tub
      4.1 out of 5 stars with 7 reviews
      4.1 (7)

      Purina Wind and Rain All Season 4 Availa Cattle Mineral, 225 lb. Tub

      $229.99
    9. Top Rated
      Gamgee Highly Absorbent Animal Wound Padding Roll, 12 in. x 11-1/2 ft.
      5.0 out of 5 stars with 12 reviews
      5.0 (12)

      Gamgee Highly Absorbent Animal Wound Padding Roll, 12 in. x 11-1/2 ft.

      $21.99
    10. Equiderma Zinc Oxide Paste
      3.8 out of 5 stars with 47 reviews
      3.8 (47)

      Equiderma Zinc Oxide Paste

      $29.99
    11. Top Rated
      KOPERTOX Thrush Treatment for Horses, 8 oz.
      4.8 out of 5 stars with 16 reviews
      4.8 (16)

      KOPERTOX Thrush Treatment for Horses, 8 oz.

      $33.99
    12. Champion's Choice Trace Mineral Salt Block with Iodine (EDDI), 50 lb.
      3.7 out of 5 stars with 3 reviews
      3.7 (3)

      UnbrandedChampion's Choice Trace Mineral Salt Block with Iodine (EDDI), 50 lb.

      $12.49

    Customers Also Bought

    1. Derbymed Crosulin 2.2 lb.
      0.0 out of 5 stars with 0 reviews
      0.0 (0)

      Derbymed Crosulin 2.2 lb.

      $149.99
    2. TRM Hemorex - 3.3 lb., 323470-1.5
      0.0 out of 5 stars with 0 reviews
      0.0 (0)

      TRM Hemorex - 3.3 lb., 323470-1.5

      $149.99
    3. TRM Kurasyn 360X, 3.75L
      0.0 out of 5 stars with 0 reviews
      0.0 (0)

      TRM Kurasyn 360X, 3.75L

      $269.99
    4. Top Rated
      Nutrena Triumph Triumph Horse Block 33.3 lb.
      5.0 out of 5 stars with 3 reviews
      5.0 (3)

      Nutrena Triumph Triumph Horse Block 33.3 lb.

      $16.99
      Was $19.99Save $3.00
    5. Derbymed ReShape 2.2 lb.
      0.0 out of 5 stars with 0 reviews
      0.0 (0)

      Derbymed ReShape 2.2 lb.

      $84.99
    6. equinova Vitalysan Powder 6.6 lb. Bucket
      0.0 out of 5 stars with 0 reviews
      0.0 (0)

      equinova Vitalysan Powder 6.6 lb. Bucket

      $64.99
    7. Spectra Ultra-Sel Horse Supplement, 1 gal.
      0.0 out of 5 stars with 0 reviews
      0.0 (0)

      Spectra Ultra-Sel Horse Supplement, 1 gal.

      $49.99
    8. TRM Vita-E Plus - 11 lb (5kg)
      0.0 out of 5 stars with 0 reviews
      0.0 (0)

      TRM Vita-E Plus - 11 lb (5kg)
    9. Hoveler REFORMIN Muesli 13 lb. Bucket
      0.0 out of 5 stars with 0 reviews
      0.0 (0)

      Hoveler REFORMIN Muesli 13 lb. Bucket

      $49.99
    10. Hoveler Reformin StiXX 22 lb. Bucket
      0.0 out of 5 stars with 0 reviews
      0.0 (0)

      Hoveler Reformin StiXX 22 lb. Bucket

      $84.99
    11. VetOne Amino Acid Concentrate, 16 oz.
      0.0 out of 5 stars with 0 reviews
      0.0 (0)

      VetOne Amino Acid Concentrate, 16 oz.

      $5.99
    12. Top Rated
      Manna Pro Calf-Manna Livestock Supplement, 50 lb.
      4.8 out of 5 stars with 435 reviews
      4.8 (435)

      Manna Pro Calf-Manna Livestock Supplement, 50 lb.

      $51.99

    Reviews

    Rating Snapshot

    Select a row below to filter reviews.

    5 starsstars

    1
    1 review with 5 stars.

    4 starsstars

    0
    0 reviews with 4 stars.

    3 starsstars

    0
    0 reviews with 3 stars.

    2 starsstars

    0
    0 reviews with 2 stars.

    1 starstars

    0
    0 reviews with 1 star.

    Overall Rating

    5.0

    Review this Product

    Select to rate the item with 1 star. This action will open submission form.
    Select to rate the item with 2 stars. This action will open submission form.
    Select to rate the item with 3 stars. This action will open submission form.
    Select to rate the item with 4 stars. This action will open submission form.
    Select to rate the item with 5 stars. This action will open submission form.
    Adding a review will require a valid email for verification
    1 to 0 of 1 Review .

    1 Ratings-Only Review

    Get the top deals, latest trends and more
    Sign up for emails from Tractor Supply today.
    First Name*
    Last Name*
    Email*

    Customer Support

    • Order Status

    • Return Policy

    • Delivery Options

    • Tax Exemptions

    • Frequently Asked Questions

    • Contact Us

    • Recall Notices

    • Call:  

      (877) 718-6750

    • Mon - Sat: 7am - 9pm CT

    • Sun: 8am - 7pm CT

    • Closed Christmas Day

    About Us

    • Who We Are

    • Investor Relations

    • Stewardship

    • Community

    • Military Support

    • Product Catalog

    • Tractor Supply Stores

    • .Pharmacy Verified Website

    Work With Us

    • Careers

    • Sponsorship

    • Affiliate Program

    • Potential Vendor Partners

    • Vendor Information

    • Tractor Supply Media Network

    Neighbor's Club

    • About

    • Rewards

    • Hometown Heroes

    • Frequently Asked Questions

    • Terms & Conditions

    Credit Center

    • TSC Credit Card

    • Klarna

    Stay Connected

    Connect & Share with the Tractor Supply Community.

    Tractor Supply App

    Shop on the go with the Tractor Supply App

    Learn More

    Stay Connected

    Connect & Share with the Tractor Supply Community.

    Tractor Supply App

    Shop on the go with the Tractor Supply App

    Learn More
    • Order Status

    • Return Policy

    • Delivery Options

    • Tax Exemptions

    • Frequently Asked Questions

    • Contact Us

    • Recall Notices

    • Call:  (877) 718-6750

    • Mon - Sat: 7am - 9pm CT

    • Sun: 8am - 7pm CT

    • Closed Christmas Day

    • Who We Are

    • Investor Relations

    • Stewardship

    • Community

    • Military Support

    • Product Catalog

    • Tractor Supply Stores

    • .Pharmacy Verified Website

    • Careers

    • Sponsorship

    • Affiliate Program

    • Potential Vendor Partners

    • Vendor Information

    • Tractor Supply Media Network

    • About

    • Rewards

    • Hometown Heroes

    • Frequently Asked Questions

    • Terms & Conditions

    • TSC Credit Card

    • Klarna

    Connect & Share with the Tractor Supply Community.

    Shop on the go with the Tractor Supply App

    Learn More
    • Privacy policy
    • Your Privacy Choices
    • Terms and Conditions
    • California Transparency Act
    • Legal Notices
    • Accessibility
    • Responsible Disclosure Statement
    • Surprise (Balance) Medical Billing Disclosure
    • Transparency in Coverage
    • Human Rights Policy
    • Vendor Code of Conduct
    • California Notice of Collection
    • Privacy Requests

    © 2026, Tractor Supply Co. All Rights Reserved.