Nzymes Bac-Pak Plus, probiotics and digestive enzymes for pets
Best seller Probiotics + enzymes

Bac-Pak Plus

4.6 ★★★★★ 412 verified reviews

Because good health always begins in the gut.

Your pet's body has been balancing its own gut since the day it was born. Bac-Pak Plus replenishes what's been lost with live probiotics plus eight digestive enzymes, micro-encapsulated so they arrive ready to work.

Size3.5 oz
Purchase type
Auto-Ship saves 10% on every order · never run out · cancel anytime
Ships every
QuantityPer-bottle savings
1 bottle × $31.99$31.99
Order total$31.99
$33.01 more to unlock free shipping

120-day worry-free guarantee

Most families notice changes within a few days to a few weeks.

Probiotics + enzymes
Dual-action gut blend
100% human-grade
Made with premium ingredients
Micro-encapsulated
More survives to the gut
Made in U.S.A.
Family-owned since 1999
120 Day
Worry-Free Guarantee
Free shipping
On orders $65+
Does this sound like your pet?

You know when something isn't right.

You have changed the food. Maybe sat through a round or two of antibiotics. You are still cleaning up, still worrying, still wondering if this is just how it is now. It is exhausting, and it is not your fault. A gut that is off looks much the same in a dog, a cat, or a horse, and it is more fixable than you have been led to believe.

If any of these sound familiar, you're in the right place.
You haven't been failing your pet. You've just been missing one piece.
Here is how Bac-Pak Plus helps.

What is Bac-Pak Plus?

Bac·Pak·Plus

A once-a-day blend of live probiotics and digestive enzymes for dogs, cats, and horses. Three parts, three jobs, and the name spells out each one.

Bac for bacteria

The live probiotics.Four lactic-acid-producing strains, chosen for the way they colonize different stretches of the GI tract, small intestine to colon.

Pak for packaged

The way they travel together.Each strain micro-encapsulated and packed alongside the enzymes, protected from heat, moisture, and stomach acid so more arrives alive at the gut.

Plus for the extra eight

The digestive enzymes.Eight enzymes paired alongside the probiotics, breaking down starches, proteins, fats, and plant matter so the body can absorb what the food actually contained.

The difference

Why both: probiotics and enzymes.

Most gut supplements pick a side. Bac-Pak Plus does the full job: replenishes the good bacteria and gives the body the enzymes it needs to actually use the food in the bowl.

Probiotics that actually arrive

Most probiotics never reach the gut, they're killed by heat, moisture, or stomach acid on the way down. Bac-Pak Plus uses micro-encapsulation, so more of every dose lands where it does its work.

Replenishes good bacteria after antibiotics, stress, or diet changes, the moments your pet needs it most.

Enzymes that unlock the food

Eight digestive enzymes break down starches, proteins, fats, and fibers more completely, turning what you feed into what the body can actually absorb and use.

More nutrition per bite. Less wasted food. Less stool. Less stomach upset.

A foundation, not a band-aid

Yucca extract minimizes stool odor. Active dried yeast supports energy and immunity. Flaxseed delivers omega fatty acids for skin and coat. Everything earns its place.

This isn't a fix for one bad week. It's the daily, long-term gut foundation underneath everything else.

Full transparency For the ones who read every label. All five strains and all eight enzymes, with the real activity numbers, right on the label.
5 live strains 1 billion CFU/g guaranteed 8 working enzymes
Show me the numbersHide the numbers 2-minute read
The probiotic blend

Five strains, one balanced gut.

Each strain colonizes a different stretch of the GI tract and does a different job. Four are lactic-acid producers, together guaranteed at 1 billion CFU per gram; the fifth, Bacillus subtilis, is a hardy spore-former that survives the gut on its own.

1 billion CFU/g · four lactic-acid strains
Lactic-acid CFU/g
1billion

All four strains are micro-encapsulated, protected from heat, moisture, and stomach acid so more arrives alive at the gut, where they do their work. Individual strain ratios approximate. Every batch is made to deliver 1 billion CFU per gram.

Eight digestive enzymes

The other half of the blend.

Probiotics rebalance the gut. Enzymes do the actual work of breaking food down, so what you feed becomes what the body absorbs. Bac-Pak Plus carries eight, each targeting a different macronutrient.

Total enzymes
8working
Full activity breakdown
Enzyme
Activity per gram
What it does
alpha-Amylase Aspergillus oryzae
3,560 µgstarch hydrolyzed/min
Breaks down starches and complex carbohydrates so they release usable energy.
Protease Aspergillus oryzae
475 µgamino acids hydrolyzed/min
Breaks proteins down to amino acids, the raw materials for muscle, skin, and immune cells.
Hemi-Cellulase Aspergillus niger
410 µghemicellulose broken-down/min
Releases trapped nutrients from plant cell walls, improving fiber digestion.
Phytase Aspergillus niger
240 µgphytate hydrolyzed/min
Unlocks bound minerals, phosphorus, iron, zinc, that would otherwise pass through unused.
Cellulase Aspergillus niger
190 µgcellulose broken-down/min
Breaks down cellulose, the structural fiber in plant matter, for better stool form.
Lipase Aspergillus oryzae
140 µgfatty acids hydrolyzed/min
Breaks down fats into fatty acids, the building blocks for healthy coat, skin, and brain.
Pectinase Aspergillus niger
95 µgpectin broken-down/min
Breaks pectin in fruits and vegetables, easing digestion and reducing gas.
beta-Glucanase Aspergillus niger
70 µgoligosaccharides hydrolyzed/min
Breaks down beta-glucans in grains, supports gentler, more efficient digestion.

Activity values are guaranteed minimums, made to label. µg = micrograms.

A happy retriever resting among bluebells in a spring forest, the everyday vitality Bac-Pak Plus supports

A balanced gut,
in every scoop.

Probiotics plus digestive enzymes, working together to settle digestion from the inside out.

Read the science →

A verified customer story

A verified story

My senior boxer had been on antibiotics three rounds in a year for chronic skin issues, his stomach was a wreck. Within two weeks of starting Bac-Pak Plus over his food, his stools firmed up and his appetite came back. Six months in, he's a different dog. I keep two bottles in the cupboard now. I won't be without it.

RT
Rachel T., Colorado
Verified buyer · Bac-Pak Plus daily · Senior boxer

Individual results may vary.

Verified Trustpilot reviews

4.6 Based on 229 verified product reviews

Raw-fed huskies, still walking daily at 13

Our two huskies started a raw food diet when they were five that’s when we started using this product. They are now 13 and still very active. Go for walks every day.

William K. · Verified · Bac-Pak Plus

Bright teeth, full coats, fresh breath

This product has greatly helped my dogs clean up their digestive tract, which in return their teeth are bright white their skin and coats are shiny full and thick and their breath is fresh. I love all of the products.

Aimee S. · Verified · Bac-Pak Plus

A 32-year-old horse, gut kept steady

I have given my 32 year old quarter horse this product after he had a colic scare a few years ago. It has helped keep his gut healthy.

Jane · Verified · Bac-Pak Plus

Fifteen years in the pack's bowls

Must have for consistent, digestive maintenance. Part of my packs' diets for 15+ years.

Margaret M. · Verified · Bac-Pak Plus
Read all 229 Bac-Pak Plus reviews on Trustpilot →

Verified customer reviews

In their own words

What owners notice most.

We let the results speak for themselves. These are the improvements that come up again and again across verified Bac-Pak Plus reviews.

4.6★
Average rating
90%
Rated 4 or 5 stars
Better digestion & firmer stools

“Was having issues with loose stools and had results within days.”Verified review

Healthier skin & coat

“His skin and fur are finally healthy after years of awful allergies.”Verified review

Happily eaten, even by picky pets

“Great product, they don't even notice it in their food.”Verified review

Trusted for generations Loved by dogs, cats & horses A favorite for senior pets

“I attribute my animals' longevity to these products.”Verified review · 20+ year customer

Based on verified Bac-Pak Plus reviews. Bar lengths reflect how often each result is mentioned. Every pet is different, and individual results may vary.

Inside the bottle

Five ingredients, five jobs.

Probiotics for the microbiome. Enzymes for digestion. Yucca for stool odor. Dried yeast for energy and immunity. Flaxseed for skin and coat. No fillers, no shortcuts.

Illustration of a balanced gut filled with diverse probiotic bacteria, the cultures inside Bac-Pak Plus

Live probiotics

Four lactic-acid-producing strains. 1 billion CFUs per gram, micro-encapsulated so more reaches the gut.

Plant tissue under the microscope, the natural source of digestive enzymes

Digestive enzymes

Eight enzymes that break down starches, proteins, fats, and fibers, for maximum nutrient absorption.

Yucca root and leaves, source of the natural yucca extract

Yucca extract

Naturally minimizes stool odor and supports digestive comfort. The reason yard pickup gets noticeably easier.

Active dried yeast with a wooden scoop

Active dried yeast

A natural source of B-vitamins, amino acids, and beta-glucans, daily energy and immune support.

Ground flaxseed

Ground flaxseed

Omega-3 fatty acids for a healthy, shiny coat and resilient skin, the visible part of inside-out wellness.

100% GMO-free · Proudly made in the USA · Safe for long-term daily use.

Daily ritual

How to use.

Healthy habits that take less than 30 seconds.

01

Scoop & sprinkle

A 1-gram scoop ships inside every bottle. Match the portion to your pet's weight using the chart below, most pets need just a fraction of a scoop.

02

Mix into any meal

Stir into dry or wet food once daily. Bac-Pak Plus is virtually tasteless, even picky cats and senior dogs don't pick around it.

03

For sensitive stomachs, ease in

For pets with sensitive stomachs, start at half the recommended amount for one week, then increase. For diarrhea or loose stools, double the daily amount for 1–2 weeks to help rebalance the gut faster.

The probiotic timeline

What changes, and when.

Probiotics don't work like medicine, they build gradually as the good bacteria settle in and multiply. Pets coming off antibiotics, or dealing with active digestive upset, usually see changes fastest, because that's when a balanced gut is most missed. Here's the rhythm most families notice once Bac-Pak Plus becomes part of the daily routine.

First 48 hours

Enzymes go to work

  • Better breakdown of starches, proteins, and fats
  • Fewer leftovers passing through undigested
  • For loose stools: many families notice stool changes within the first few days
Week 1 – 2

The microbiome finds balance

  • Strains colonize and crowd out unwanted bacteria
  • Stool consistency stabilizes
  • Stool odor noticeably softens (yucca + balanced flora)
  • Appetite often steadier and more reliable
Month 1 onward

The compounded wins

  • Shinier coat, calmer skin (flaxseed omegas)
  • Steadier energy through the day (B-vitamins from yeast)
  • Stronger daily defenses, faster bounce-back from upsets
  • Resilience after antibiotics, travel, or diet changes

What you are really after is not on this list: the dog who meets you at the door again, the easy morning walk, the confidence that comes from not giving up. In the end, it's simple: they wag more, and you worry less.

Compare sizes

Which size is right for your household?

Same formula in every bottle. The larger sizes cost less per serving and last longer between reorders, the natural pick for equine and multi-pet households.

Nzymes paw & leaf logomarkSame formula. Bigger jars stretch further per dollar.
Best for
Single small-to-medium pet · first-time try
Multi-pet homes · large dogs · long-term value
Equine households · multiple pets · farms
Net weight
3.5 oz (100 g)
6.6 oz (200 g)
14 oz (400 g)
Scoops per bottle (1g each)
~100 scoops
~200 scoops
~400 scoops
Supply (40-lb dog, ¼ scoop/day)
~13 months
~26 months
~52 months
Supply (150-lb dog, ½ scoop/day)
~6 months
~13 months
~26 months · over 2 yrs
Supply (1,000-lb horse, 1½ scoops/day)
~2 months
~4½ months
~9 months · the equine pick
Cost per scoop
$0.32
$0.22 31% less
$0.17 47% less

Will a larger jar last? Independent third-party testing confirmed three years of shelf stability. Stored cool and dry, every size keeps its potency well within its supply window.

Find your dose

How much for your pet?

From cats to horses, tell us about your animal and we'll work out the daily scoop, the right bottle, and the auto-ship math. Add as many pets as you feed.

Tell us about your dog

Let's get the scoop right.

Species
Weight 40 lbs
For your dog, we recommend
Bac-Pak Plus · 100g bottle
¼ scoop per day
One bottle lasts ~13 months

Auto-ship 1 bottle every 6 months keeps your dog stocked, and saves 10% on every order.

Pair with Antioxidant Treats for free shipping.
Nzymes Pro-B for People, probiotic blend with digestive enzymes, 90 capsules
Made for you, too

Good gut health isn't just for pets.

When you see what Bac-Pak Plus does for your pet, the next question is usually how to get it for yourself. Pro-B is the same probiotic-and-enzyme approach, made for people.

Shop Pro-B for People →
From our family to yours

A small family company,
three generations in.

Nzymes started in 1999, when two brothers, Tom and Stan, became convinced of one simple idea: that the body can do far more than we give it credit for, if you hand it the right tools. We are still family-run, still in the same business of helping pets, and still answering the phone ourselves.

In all those years we have read thousands of letters from people in exactly the spot you may be in right now, worried about an animal they love and tired of being told nothing more can be done. We started this company for them, and for you.

— The Nzymes family

Powered by Nature. Proven by Pets.

27
Years, family-run
3
Generations
1M+
Pets helped
FAQs

Common questions.

Bac-Pak Plus combines probiotics (the "good" bacteria) with eight digestive enzymes to rebalance your pet's gut. Our micro-encapsulation process protects the probiotic strains from heat, moisture, and stomach acid, ensuring more of every dose reaches the GI tract, where it actually supports digestion, nutrient absorption, and immune strength.

Sprinkle the recommended amount over your pet's daily meal, it mixes in easily and most pets don't even notice it's there. Every bottle ships with a 1-gram scoop. Use the dosage calculator above to find the right portion for your pet's weight.

Because Bac-Pak Plus is highly concentrated, it goes a long way. As a rough guide:

100g, 4 to 6 months for most pets.
200g, 6 to 12 months for most pets.
400g, 12 to 18 months for most pets. A single 400g jar can support a 150-lb dog for over a year, or feed a full-size horse for roughly 200 days.

The dosage calculator and compare table above show the supply window for your specific pet.

Yes. It's the same formula for dogs, cats, and horses, only the daily amount changes with weight, and the calculator above works it out for each animal. It's safe for long-term daily use and especially helpful for senior pets, sensitive stomachs, and pets recently on antibiotics or under stress. Plenty of multi-pet and barn households keep a single jar for the whole crew. As always, check with your veterinarian if your pet has a chronic condition.

Bac-Pak Plus is a targeted gut formula, probiotics plus digestive enzymes, that supports balance and absorption. Best for pets coming off antibiotics, sensitive stomachs, loose stools, stool odor, and any household where digestion is the priority.

Sprouted Granules is a daily whole-food nutrition foundation, single-ingredient live sprouted soybean meal, that supports energy, coat, and immunity from the inside out.

They're designed to work together. Many families layer Bac-Pak Plus over Granules as the daily routine.

Start the day the antibiotics end (or your vet clears it). Daily probiotics help replenish the good bacteria antibiotics wipe out, plus help normal digestion return. For the first 1–2 weeks after an antibiotic course, doubling the daily amount can help rebalance the gut faster.

Most pets never notice it. Bac-Pak Plus is a fine powder you sprinkle over food, and the majority of dogs and cats take it without any fuss, many owners tell us their pets actually seem to like it. If yours is especially particular, mix it into something moist like a little wet food, broth, or plain yogurt, and start with a smaller amount, working up over a few days.

That's active dried yeast, included as a natural source of B-vitamins and trace nutrients that support steady energy and a healthy coat. It's a nutritional ingredient, not the sugary or dietary yeast some pets are sensitive to. If your pet has a known sensitivity, reach out and we'll talk it through.

Auto-ship sends your order on a schedule you choose. You save 10% on every order, always, stacked on top of any quantity discount. The cadence options widen with bigger bottles: a 100g jar ships every 2–12 months, a 200g every 3–18 months, and a 400g every 3–24 months. Pause, change, or cancel anytime from your account.

Absolutely, they're designed to layer. Bac-Pak Plus pairs naturally with Sprouted Granules, Antioxidant Treats, and Ox-E Drops. Our Support Program plans are built exactly for this kind of layered, foundational approach.

We do. Pro-B for People brings the same probiotic-and-enzyme approach to the humans in the household, live cultures paired with digestive enzymes to support a balanced gut and comfortable, everyday digestion. Same family, same belief that good health begins in the gut. You'll find it on our Pro-B for People page.

The 120-Day Worry-Free Guarantee

Try it for four months.
If it is not right, we make it right.

Give Bac-Pak Plus to your pet for up to 120 days. If you do not see the difference in digestion, stool quality, appetite, or overall vitality, send back the unused portion for a full refund. No questions, no runaround. Real gut balance takes patience, so we give you the runway to see it.

Choose your bottle →
Free shipping over $65 Cancel auto-ship anytime Made in the USA since 1999
Not sure where to start?

Find your dog's formula.

Answer a few questions and we'll point you to the right starting place, or talk to a member of our team. No guessing, no pressure.

Bac-Pak Plus · 100g bottle
1 bottle · One-time · $31.99/bottle
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$31.99 total