Quality Questions to Ask a Pet Supplement Manufacturer - A Checklist From the Source

You are holding a tub of joint chews. The label looks polished. The claims sound confident. Yet you still wonder who made it and what is really inside.

Animal supplements do not follow the same rules as human supplements. That leaves you with one strong tool: the right questions.

This guide gives you the quality questions to ask a pet supplement manufacturer. It also shows what a strong answer sounds like. Stratford Animal Care wrote it from the maker's side, so we answer every question too. Prefer to talk it through? Call us at 877-498-2002.

In this guide

Why quality questions matter
Quality systems and audits
Ingredients and testing
Formulation and species
Labels, claims and safety
Transparency and support
Red flags
Strong answers vs weak answers
How Stratford answers
Frequently asked questions

Why Do Quality Questions Matter Before You Buy a Pet Supplement?

Quality questions matter because a label shows what a company says, not what it does. Asking about audits, testing, traceability and adverse event handling lets you verify a pet supplement manufacturer's quality systems before your pet takes a single dose. A few minutes of questions can protect your pet and your budget.

A Label Shows Claims, Not Proof

Packaging is easy to design. Quality is harder to fake when you ask for documents.

A label tells you what a company wants you to believe. Audits, test reports and lot records show what the company actually does.

What Is at Stake for Your Pet

Your dog or cat cannot tell you something feels off. You depend on the product being what it says.

Inconsistent strength, weak ingredient checks or poor labeling all add risk. Good questions filter those makers out early.

What Should You Ask About Quality Systems and Audits?

Start with three questions. Does an independent party audit your facility? Do you follow written quality control procedures? Do you track and report adverse events? Strong manufacturers answer yes to all three and can show documentation. Vague replies, delays or deflection signal a company with little to show.

Does a Third Party Audit Your Facility?

Self-checks are useful. Independent audits are stronger.

Ask who audits the plant, how often, and whether you can see the certificate. A good maker names the auditor and shares the date without hesitation.

What Does the NASC Quality Seal Mean?

The NASC Quality Seal marks a National Animal Supplement Council member that passed an independent facility audit. Members must keep ongoing compliance, complete annual education, and pass random independent testing against label claims. Companies cannot buy the seal. You can check current seal holders on the NASC website.

Audits run on a two-year cycle. Companies get 60 days to correct any findings.

Confirm any seal you see on a label using the NASC member list. Some capable makers choose not to join, so also ask them about their own quality checks.

Can You Share Your Quality Control Procedures?

Written procedures show a company runs on process, not memory.

Ask whether standard operating procedures cover raw materials, blending, filling and packaging. Ask how they handle a failed batch. A confident team explains each step in plain words.

What Should You Ask About Ingredients and Testing?

Ask where ingredients come from, whether each batch is tested, and whether you can see a certificate of analysis. A certificate of analysis is a lab report listing a batch's identity, strength and purity results. Reputable makers explain their testing plainly and trace every lot.

Where Do Your Ingredients Come From?

Quality starts with raw materials. Ask which ingredients come from outside the United States.

Ask how the maker qualifies each supplier. Look for clear answers about identity, purity and strength checks on incoming materials.

Is Every Batch Tested, and Can I See the COA?

Testing should cover raw materials and finished goods. A certificate of analysis ties results to a specific batch.

Ask for a sample COA. If a company refuses, treat that as a signal. Ask whether an outside lab verifies label claims.

Can You Trace My Product With a Lot Number?

Every container should carry a lot number. That number links your product to its batch records.

It also lets a company reach customers fast if a problem appears. Check the package before you buy. No lot number means no traceability.

Who Formulates the Products, and Are They Made for Your Pet?

Ask who designs the formulas and what training they hold. Then confirm the product is made for your pet's species. Dogs and cats process some ingredients differently, so a formula that suits one may not suit the other. Look for named experts and species-specific labeling.

Who Formulates Your Products?

Credentials matter. Ask whether veterinarians, nutrition scientists or pharmacists shape the formulas.

Ask whether outside veterinary advisors review them. A proud team names its experts.

Is This Formula Made for My Pet's Species?

Species differences are real. Cats cannot handle some compounds that dogs tolerate well.

Ask how the maker checks ingredient safety by species and by size. Dosing guidance should match your animal, not a generic average.

Want to Ask Us These Questions Yourself?

Our team at Stratford Animal Care answers questions by phone. Call 877-498-2002 or contact our team online.

Prefer to browse first? View all products and compare labels with this checklist in hand.

What Should You Ask About Labels, Claims and Safety?

Ask whether label claims follow NASC guidance, whether the company reports adverse events, and whether your vet should review the product first. Compliant labels describe how a product supports normal body function. They avoid disease claims and cure promises.

Do Your Label Claims Follow NASC Guidance?

Compliant labels use measured language. Words like support, maintain and promote are common.

Claims about curing, treating or preventing disease are red flags on a supplement. Ask how the company reviews labels before printing.

How Do You Handle Adverse Event Reports?

Every product can draw complaints. What matters is the system.

NASC members must report adverse events every month and track them in a shared database. Ask any maker how it logs, reviews and follows up on reports.

Should I Talk to My Veterinarian First?

Yes. Your veterinarian knows your pet's history and current care.

Share the full ingredient list before you start. Talk with your veterinarian before beginning any supplement. A supplement never replaces veterinary care.

What Should You Ask About Transparency and Support?

Ask who answers the phone, who makes the product, and who handles complaints. Transparent companies give direct names, locations and contact details. They welcome questions because they expect scrutiny. Hidden manufacturers and anonymous support lines are reasons to keep looking.

Who Can I Call With Questions?

A real phone number is a quality signal. Call it.

Notice how fast someone answers. Notice whether staff can discuss testing and ingredients. Good support teams explain without pushing a sale.

Are You the Manufacturer or a Reseller?

Some brands buy finished goods and add a label. Others control production.

Ask who makes the product and where. When you buy from the maker, answers come from the source.

What Red Flags Should You Watch For?

Dig deeper or walk away when you see these signs:

No lot number on the container
No phone number or reachable contact
Refusal to share a COA or audit proof
Disease-treatment or cure claims
Comparisons to prescription drugs
Unnamed formulators and "secret" formulas
Prices far below similar products, with no explanation

One red flag deserves a follow-up question. Several together mean you should keep looking.

How Do Strong Answers Compare With Weak Answers?

Use this table during your next call or email exchange.

Question	Strong Answer	Weak Answer
Facility audit	Names the auditor and shares the certificate	"We follow high standards"
Testing	Shares a batch COA	"Our products are tested," with no proof
Traceability	Lot number on every container	No lot number
Formulation	Names credentialed formulators	"Proprietary," with no detail
Support	Staff answer by phone	Contact form only

How Does Stratford Animal Care Answer These Questions?

We expect you to ask. We would rather you do. Here is who we are.

Manufacturer-Direct, Not a Reseller

Stratford Animal Care is a pet supplement manufacturer based in Oldsmar, Florida. We are a subsidiary of Swedencare, a pet health group with production facilities across several countries.

You deal with the maker. Ask our team about quality documentation, testing and lot traceability. We walk you through each answer by phone.

Check the NASC member list for current seal status before you call any company, including us.

Veterinary-Grade Lines Across Seven Brands

Our family includes Stratford Animal Care, VetClassics, Rx Vitamins, ProDen DentalCare, Relaximal, CeraGuard and Animal Pharmaceuticals.

Explore veterinary-grade supplements from VetClassics. Browse joint support, digestive health and immune support collections. Explore the Rx Vitamins line as well.

For Clinics, Retailers and Brand Owners

Run a clinic? Request a veterinary account.

Building your own line? Our private label team works as a private label pet supplement manufacturer partner. We also offer veterinary staff education programs for clinic teams.

Frequently Asked Questions About Choosing a Pet Supplement Manufacturer

What does the NASC Quality Seal mean?

The NASC Quality Seal shows that a National Animal Supplement Council member passed an independent facility audit. Members must keep ongoing compliance, finish annual training, and pass random testing against label claims. Seals cannot be purchased. Confirm any seal on the NASC member list before you rely on it.

Are pet supplements regulated?

Animal supplements do not follow the same rules as human supplements. Oversight comes from several sources, including FDA and state authorities. Industry programs like NASC add audits, labeling standards and adverse event tracking. That is why asking the manufacturer direct questions matters so much.

What is a certificate of analysis?

A certificate of analysis, or COA, is a lab report for a specific batch. It lists test results such as identity, strength and purity. Ask the manufacturer for a sample. Match the lot number on your container to the report whenever possible.

How do I know a supplement is made for my pet's species?

Check the label for the intended species, such as dogs or cats. Look for dosing by weight. Ask who formulated the product and how they review species safety. If a company cannot answer, choose another product. Your veterinarian can help you confirm the fit.

Can I call the manufacturer with questions?

Yes, and you should. A reputable manufacturer lists a working phone number and staff who can discuss ingredients, testing and quality. Stratford Animal Care answers at 877-498-2002. Notice how quickly and clearly a company responds. That tells you a great deal.

Do I need to ask my veterinarian first?

Yes. Talk with your veterinarian before starting any supplement. Your vet knows your pet's health history and current care. Bring the label and ingredient list to the visit. Your vet can tell you whether the product fits your pet's age, size and routine.