Nancy L. Verified Customer
"Improved the color in their combs, and helped the majority of the flock start laying more eggs after a harsh winter. We have 45 layers."
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Hen Harmony — The All-In-One Gut Support Supplement For Chickens

Supports Gut Health
Strength During Stress
Made In USA
51 verified reviews from real flock owners

One scoop in their water each day. Hen Harmony supports hydration, digestion and gut balance so your flock stays steady through heat, cold and laying stress.

1. How Many Hens Do You Have?

2. How Many Bags?

3. Choose Your Plan

90-Day Quality Guarantee Ships Within 24 Hours

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"So easy to use and I love that the scoop is included with the bag! My flock has no issue drinking the water. An essential for my hot Florida summers!"

Kaylee R. · Verified GrubTerra Customer

Tell Me About:

Key Ingredients
GrubTerra
Others
Seven Probiotic Strains
Seven Probiotic Strains
Most chicken probiotics have one or two strains. Hen Harmony has seven, the good bacteria that support gut balance, firmer droppings, and cleaner eggs.
Dual Prebiotics
Dual Prebiotics
Yeast Extract and FOS. These are the food that keeps the probiotics working, so more of your feed actually gets absorbed instead of passing through.
Electrolytes + Betaine
Electrolytes + Betaine
Potassium, sodium, and magnesium replace what panting hens lose in the heat. Plus betaine, the commercial-grade ingredient that helps cells hold water when it's hot or cold.
Chelated Minerals
Chelated Minerals
Zinc, manganese, copper, and iron in the absorbable form commercial farms use. Your hens actually get to use these minerals instead of wasting them.
Full Vitamin Panel
Full Vitamin Panel
A, D3, E, K, all the B vitamins, and C. Everything a laying hen needs daily. D3 is the one that lets her actually use the calcium in her feed.
Shell-Building Minerals
Shell-Building Minerals
Calcium and phosphorus plus chelated zinc and manganese. Together they support stronger, thicker eggshells you can count on.
Product Details

Hen Harmony is an all-in-one water supplement for backyard chickens: seven probiotic strains, prebiotics, electrolytes, vitamins and minerals in one scoop. Add it to your flock's drinking water based on the total amount of water in the waterer, and mix thoroughly before offering to hens.

📏 HOW OFTEN SHOULD I USE IT?

1–8 chickens: 1 bag every 3 months
9–14 chickens: 1 bag every 2 months
15–21+ chickens: 1 bag every month

Product Benefits

💧 Supports hydration & electrolyte balance during stress Heat, cold, and stress can quickly disrupt fluid balance. This helps support hydration and electrolytes so hens can maintain normal function during demanding conditions.

🦠 Supports gut balance & beneficial bacteria Stress can upset digestive balance. This helps support a healthy gut environment so digestion stays steady when hens are under pressure.

🐔 Helps hens cope with heat, cold & environmental stress Seasonal and environmental changes can strain a hen's system. This formula supports overall balance to help hens stay steadier through daily stressors.

🥚 Helps maintain steady egg production through seasonal stress Stress can affect normal laying patterns. By supporting hydration and digestion, this helps maintain the nutritional support needed for normal egg production.

🇺🇸 Made in the USA with flock-safe ingredients Carefully selected, flock-safe ingredients with no harsh chemicals or unnecessary fillers.

Real keepers. Real flocks.

What Keepers Notice With Hen Harmony In The Water

Read all 51 verified Hen Harmony reviews
  • 🌡️ Gets them through heat waves
  • 🥚 Laying picks back up
  • 🥄 Dissolves fast, easy to mix
  • 🧺 One scoop instead of five products
"It's wonderful and they seem to really enjoy it my dad just came by and said wow you have really healthy looking birds and I showed him the peck purity and the hen harmony so apparently it works! Others are noticing now!"
Samantha P. Verified Buyer
"This product dissolves fast much better than any other product that I have tried. Thank you"
Karen S. Verified Buyer
"My girls in love with it …Especially in the hot days.. Thank you !!!"
Nataly N. Verified Buyer
"Always love to give my gals supplements and good nutrition. This fits the bill (beak? - LOL) and they love it!!"
Joseph M. Verified Buyer
"Chickens laying eggs and staying cool"
Diane F. Verified Buyer
"After using it with my flock for the past couple of weeks, I've noticed a clear improvement in overall egg production… The chickens enjoy it, it's easy to add to their normal feeding routine, and I've been very happy with the results."
Elmer T. Verified Buyer

Swipe for more reviews →

Quick Questions

Will my hens drink it?

Most flocks drink it like normal water. One Amazon reviewer said their hens "didn't seem to mind the taste at all since they kept drinking normally." If yours are picky, start with a lighter mix and build up over a few days, and in hot weather keep a waterer of plain water alongside.

What's actually in it?

Everything is listed further down this page, word for word from the label: 7 probiotic species, 2 prebiotics, electrolytes, 13 vitamins and trace minerals. See the full ingredient list.

How do I use it?

Stir it into the drinking water with the included scoop: 2 grams per gallon every day, or 4 grams per gallon when hens are under extra stress like hot weather. Mix it fresh each day.

How do I keep the powder fresh?

It's a dry powder, so moisture is the enemy. Seal the bag tight after every scoop and keep it somewhere cool and dry, not in a humid coop. If a bag ever arrives caked or damaged, email us photos and we'll replace it.

How many bags do I need?

Every 3 months: 1 bag for 1–8 hens, 2 bags for 9–14 hens, 3 bags for 15 or more. Tell us your flock size above and we'll time your refills to match.

Can I still eat the eggs?

Yes. Hen Harmony is non-medicated, so there's no egg withdrawal.

Is it a dewormer?

No. It's a daily water supplement for hydration, gut balance and nutrition. For daily gut defense in the feed, see Peck Purity.

Can I skip or cancel?

Yes. Skip, pause or cancel your subscription anytime. Orders of $99.99+ ship free; smaller orders ship for $6.98.

The Problem

Signs Your Flock Needs More Support

Most keepers treat these one at a time. But they come down to the same few things: stress, a gut that's off, and nutrients that never get absorbed.

A hen fluffed up against the cold

Seasonal Stress & Slow Laying

Heat waves, cold snaps and molt throw hens off. She eats and drinks less, and the nest box goes quiet.

Eggs smeared with droppings in the nest box

Watery Droppings & Dirty Eggs

When her gut is off, droppings turn runny and end up on her and on your eggs.

Spilled feed around a feeder

Eating Lots, Laying Little

You keep filling the feeder but the eggs don't keep up. A lot of that feed passes right through her.

A tired hen with a pale comb

Pale Combs & Low Energy

A washed-out comb and a hen who hangs back. She isn't getting all she needs from her food.

The Solution

Meet Hen Harmony Five Supplements. One Scoop.

Probiotics, prebiotics, electrolytes, vitamins and minerals in one scoop. It goes in the water, so every hen gets it, and it goes to work right in her gut.

  • It Goes In The Water

    Every hen drinks, even the ones that hang back at the feeder. It dissolves fast, so it mixes in seconds.

  • Seven Probiotic Species

    Including two spore-forming Bacillus strains that are built to make it through the waterer and the gizzard.

  • Non-Medicated, No Egg Withdrawal

    A daily supplement, not a medicine. Keep collecting and eating your eggs like normal.

  • Made In The USA By GrubTerra

    Caring for backyard flocks since 2019, with 100,000+ orders shipped to keepers across America.

Start Your Flock's Routine
90-Day Quality PromiseMade in the USANo egg withdrawal

Tap To Explore

What's In One Scoop?

7probiotic species

Probiotics: the good bacteria

Seven species of beneficial bacteria, at least 0.8 billion CFU per gram (label). Two are spore-forming Bacillus, which survive the trip through the gizzard.

  • L. acidophilus
  • E. faecium
  • B. licheniformis
  • B. subtilis
  • B. animalis
  • L. delbrueckii subsp. lactis
  • L. lactis
Verified GrubTerra Review
Started using Hen Harmony in our chicken's water. Improved the color in their combs, and helped the majority of the flock start laying more eggs after a harsh winter. We have 45 layers, and they had a long streak of reduced egg laying through this last winter. This improved after daily use for about 2 weeks.
Nancy L.Keeps 45 layers · Verified Buyer

4 Things Hen Harmony Does For Your Flock. Every Day.

Real studies on what's inside every scoop.

01

Good Bacteria, Every Day

7 kinds of good bacteria

Every scoop has 7 kinds of good bacteria for her gut. Across 47 studies of laying hens, adding good bacteria meant more eggs and thicker shells. They pass through, so hens need them every day. That's why it goes in the water.

The research: Sjofjan et al., 2021 (47 studies). Latorre et al., Poultry Science, 2014.

02

Heat & Cold Stress Support

ElectrolytesZinc + vitamin C

Hot days: at 93°F, hens given one of Hen Harmony's good bacteria kept laying and eating while the others slowed down.

Cold days: zinc and vitamin C, both in Hen Harmony, helped cold hens lay bigger eggs with better shells. Electrolytes help keep her drinking.

The research: Deng et al., Poultry Science, 2012. Rajabi & Torki, 2021.

03

More Eggs In The Nest Box

Good bacteriaVitamin D3

In a study of 560 older hens, the ones given one of Hen Harmony's good bacteria laid 8 more eggs per 100 hens, every single day. They also laid far fewer broken eggs.

The research: Tang et al., Poultry Science, 2026 (E. faecium, 87.3% vs 95.1% laying rate). A keeper says: "helped the majority of the flock start laying more eggs after a harsh winter." – Nancy L.

04

Gets More Out Of Every Bite

Good bacteriaPrebiotics

Hens given one of Hen Harmony's good bacteria absorbed more protein and calcium from the same feed, and laid more eggs. More of your feed goes to work.

The research: Oh et al., Poultry Science, 2026 (B. subtilis).

Start Your Flock's Routine
90-Day Quality PromiseMade in the USANo egg withdrawal
5-in-1vitamins, minerals, probiotics, prebiotics, electrolytes
100,000+GrubTerra orders shipped to keepers
180servings in every bag
Tisha J.'s basket of clean eggs
"We used to have dirty, gross eggs. Now, look at them after just 2 weeks using hen harmony!"
Tisha J., Verified Buyer
"We got hit with a heat wave the last few days so I've been giving this to my hens as often as I can. They are loving it."
Kaylyn R., Verified Buyer

What's In The Bag. Nothing Hidden.

Open bag of Hen Harmony with the included scoop
  • 🦠

    7 Probiotic Species

    Lactic-acid bacteria plus two spore-forming Bacillus. Min. 0.8 billion CFU per gram.

  • 🌾

    Yeast Extract + FOS

    Prebiotics that feed the good bacteria.

  • 💧

    Electrolytes + Betaine

    Potassium, sodium, magnesium and phosphate to support hydration.

  • ☀️

    Vitamins A, D3, E, K, C + B Group

    A full daily panel, including D3 for shell-building.

  • ⛏️

    Chelated Trace Minerals

    Zinc, manganese, copper and iron (each also chelated), plus selenium and iodine.

See the full ingredient list from the label

Yeast Extract, Fructooligosaccharides, Dextrose, Sucrose, Potassium Chloride, Salt, Magnesium Oxide, Betaine, Calcium Propionate, Monopotassium Phosphate, Sodium Aluminosilicate, Zinc Sulfate, Choline Chloride, Ferrous Sulfate, dl-alpha-Tocopheryl Acetate (vitamin E), Manganese Sulfate, Niacinamide, Vitamin A Acetate, Dicalcium Phosphate, Monocalcium Phosphate, Copper Sulfate, Vitamin D3 Supplement, d-Calcium Pantothenate, Ascorbic Acid (vitamin C), Iron Amino Acid Complex, Menadione Sodium Bisulfite Complex (vitamin K activity), Riboflavin, Zinc Amino Acid Complex, Selenomethionine Hydroxy Analogue, Manganese Amino Acid Complex, Pyridoxine Hydrochloride, Vitamin B12 Supplement, Thiamine Mononitrate, Copper Amino Acid Complex, Folic Acid, Calcium Iodate, Biotin, Sodium Selenite, and dried fermentation products of Lactobacillus acidophilus, Enterococcus faecium, Bacillus licheniformis, Bacillus subtilis, Bifidobacterium animalis, Lactobacillus delbrueckii subsp. lactis and Lactococcus lactis biovar diacetylactis.

Guaranteed analysis: lactic acid bacteria min. 0.8 billion CFU/g · vitamin A min. 30 IU/g · vitamin D min. 15 IU/g.

No medications No egg withdrawal No artificial dyes

How Many Bags Does Your Flock Need?

Every 3 months, you need 1 bag

Covers 1–8 hens for a full 3 months.

Hen Harmony with the included scoop

1Scoop

2 grams per gallon, or 4 on hot or stressful days.

Hen Harmony being scooped into a water bowl

2Stir

Mix it into fresh water. It dissolves in seconds.

A customer's hen beside a bag of Hen Harmony and a basket of eggs

3Enjoy

Refresh it daily and keep founts clean.

Start Your Flock's Routine
90-Day Quality PromiseMade in the USANo egg withdrawal

What To Expect

How Quickly Keepers Notice A Difference

  1. Day 1

    A scoop in the waterer

    It dissolves fast. If your hens are picky, start with a lighter mix.

  2. Week 1

    Steadier through the heat

    Keepers in hot states use it to get their girls through heat waves.

  3. Week 2–3

    Cleaner eggs, laying picks up

    Keepers saw it at about two weeks: cleaner eggs, brighter combs, and more eggs after a hard winter.

  4. Month 1+

    It's just the routine

    One scoop with the morning water refill, mixed fresh each day.

  5. Every Season

    Ready for what's next

    Heat, cold, molt or a move: it's already part of the routine.

Based on what keepers tell us in their reviews. Every flock is different.

Why Keepers Switch To Hen Harmony

Hen HarmonyElectro­lyte PacketsPro­biotic-Only Powders
Probiotics (7 species)VariesVaries
Prebiotics to feed themVariesVaries
Electrolytes + betaine
Full vitamin panelVaries
Chelated trace mineralsVaries
All 5 in one scoopVaries
Made in the USAVariesVaries

The GrubTerra Quality Promise

Made Right, Or We Make It Right

Every bag is made in the USA and checked before it ships. If your order arrives damaged or defective, email us photos within 90 days of delivery and we'll refund or replace it.

  • Refund or replacement on damaged or defective bags
  • Skip, pause or cancel your subscription anytime
  • Real people at support@grubterra.com
Start Your Flock's Routine

What Other Keepers Are Saying