Red Flags to Watch For When Choosing a Stud Dog

Experience breeds wisdom — but some lessons cost too much to learn firsthand

Choosing the wrong stud dog is not just a breeding disappointment. It can result in unhealthy puppies, a dam exposed to disease or injury, a litter of unregisterable offspring, and a damaged reputation that takes years to rebuild.

The warning signs are usually there in advance. Here is how to spot them.

Red Flags in the Stud Dog

No Health Testing Documentation

This is the most important red flag on this list. A stud owner who claims their dog is "healthy" but cannot produce documentation has not done the testing, is unwilling to show you the results, or both.

Health testing is not expensive compared to the cost of a litter with health problems. Any stud owner who cannot provide current OFA records, DNA test results, and breed-specific clearances should not be breeding.

What to ask for:

• OFA hip and elbow evaluations (or PennHIP)
• OFA patella grade (small breeds)
• CAER eye exam certification (annual)
• DNA panel results from Embark or equivalent
• Breed-specific clearances (cardiac, SA, SM/CM, etc.)

"He's never had any health problems" is not health testing. It is the absence of information.

Health Tests That Are Outdated or Incomplete

Watch for:

• CAER eye certifications older than 12 months (must be renewed annually)
• OFA ratings from a dog under 2 years old (hips should be evaluated at 24 months minimum)
• Missing tests for known breed-specific conditions
• Embark results cited without listing the specific conditions tested

Health testing is not a one-time event.

The Dog Is Very Young

A male offered for stud at 9 or 12 months has not had full OFA evaluations, has not demonstrated adult temperament, and cannot have any track record.

Young males can technically breed. That does not mean they should be used for serious breeding programs.

Poor Temperament

A nervous, reactive, or aggressive stud will pass those tendencies to his offspring. Temperament is highly heritable.

When evaluating a stud, he should be:

• Confident and curious around strangers
• Calm and controllable
• Non-reactive in neutral environments

An owner who resists letting you observe the dog or becomes defensive when asked is showing you another red flag.

Genetic Issues Relevant to the Cross

• A dapple Dachshund stud being offered for breeding with another dapple — double merle risk
• A merle Australian Shepherd being offered to another merle — same double merle risk
• A carrier stud (for any serious recessive condition) being offered without disclosure
• A Miniature Poodle stud that is not F/F for furnishings being offered as a doodle cross partner

If a stud owner cannot explain the genetics of the specific cross you are considering, that is a problem.

Red Flags in the Stud Owner

No Written Contract

A stud owner who does not use a written contract is either disorganized, inexperienced, or planning to be difficult if something does not go as expected.

A written contract should specify: the stud fee, when it is due, the rebreeding policy, and what documentation will be provided.

Vague or Changing Stud Fee Terms

The fee should be clear before the breeding. If an owner quotes one amount, then mentions add-ons after you have committed, you are dealing with someone who does not operate transparently.

No References — or Reluctance to Provide Them

A stud with a track record has satisfied dam owners. A reputable stud owner is proud to refer you to them. If an owner says they have had previous litters but cannot provide a single reference, ask yourself why.

Difficulty Communicating

If getting a response requires multiple follow-ups before the breeding, it will be worse during and after. Responsiveness before the breeding predicts responsiveness after it.

Pressure to Breed Immediately

A stud owner who pushes you to book quickly, without giving you time to review health testing or ask questions, is often trying to prevent you from doing the due diligence that would reveal a problem.

Reputable stud owners welcome your questions.

No AKC or CKC Registration

For purebred breeding, an unregistered stud means an unregisterable litter. Your buyers will not be able to register their puppies.

Photos Do Not Match the Dog You Meet

Always meet the stud in person before committing — or at minimum, request a recent live video call. If the owner resists this, walk away.

What to Do When You Encounter Red Flags

Trust your instincts. If something feels wrong — if an owner is evasive, if the documentation does not add up, if the dog's behavior concerns you — step back.

The right stud for your female is out there. Ask other breeders in your community for referrals. Use platforms where health testing is documented publicly.

Summary: The Quick-Reference Red Flag List

In the dog:

• No health testing documentation
• Outdated or incomplete health clearances
• Too young for full evaluation
• Poor or anxious temperament
• Genetic risks not disclosed

In the owner:

• No written contract
• Vague, changing, or verbal-only fee terms
• No references from previous dam owners
• Slow or evasive communication
• Pressure to book quickly without time to review
• Unregistered stud
• Photos that do not match the actual dog

When everything checks out — documentation, temperament, communication, and a clear written agreement — you have found a stud worth booking.