Pedigree analysis is how a breeder sees past the dog in front of them to the family it comes from — because a dog is a sample of its relatives, and what runs in the line often predicts what it will pass on better than the individual alone. This guide is about reading a pedigree for information, not decoration.
The most important first
- A dog is a sample of its family; relatives are data.
- Read pedigrees for what’s consistent in a line, not just for famous names.
- Siblings and offspring often tell you more than the dog itself.
- Watch for what a line consistently gives — good and bad.
- Pedigree analysis sets up the genetics and combination planning that follow.
How to approach pedigree analysis
A pedigree is not a trophy cabinet of titled ancestors; it’s a map of where a dog’s genes come from. Reading it well means looking for patterns — traits, strengths and problems that appear consistently across a family — rather than being dazzled by a single celebrated name several generations back, whose influence is by then heavily diluted. The useful questions are: what does this family reliably produce, and what does it reliably struggle with?
Count, don’t just read. One famous ancestor five generations back has little influence on its own, but the same dog appearing again and again, especially on both the sire’s and dam’s sides, adds up. That repetition is what a coefficient of inbreeding captures, so run the planned mating through your kennel club’s calculator. Remember that a pedigree with only a few recorded generations will understate it.
Relatives as data: siblings and offspring
Two groups of relatives are especially informative. Siblings and half-siblings show you the range a family produces — a dog with excellent littermates and offspring is a safer bet than an equally nice dog whose relatives are uneven. Offspring, where they exist, are the most direct evidence of all: a dog is, in breeding terms, largely what it produces — though a few litters with one mate are a small sample, and the mate contributed half of each. Learning to gather and weigh this “horizontal” and “descending” information is what separates pedigree analysis from pedigree admiration.
Public health databases make this practical. In the US, OFA records and CHIC reports let you see results for parents, littermates and offspring. The Royal Kennel Club’s Health Test Result Finder does the same in the UK, and many national kennel clubs keep similar records. Geneticists build estimated breeding values in the same way, combining a dog’s own results with those of its relatives. Look for missing results as well as poor ones: publishing results is often voluntary, and a family where few dogs were tested tells you less than it seems to.
In practice
Two studs look equally good on paper. One has a row of sound, typey siblings and offspring; the other’s relatives are a mixed bag with a recurring health issue. The individuals are similar — but the families are not, and the family is what the breeder is really choosing.
(Illustrative, composite scenario.)
Reading a line’s consistent tendencies
Every line tends to give certain things — a kind of front, a temperament, a strength, a recurring fault. Good pedigree analysis names those tendencies honestly, so you can pair a line’s weakness with a mate whose family is genuinely strong there, and avoid doubling up on a shared problem. This is also where pedigree meets genetics: relationship and shared ancestry affect health and diversity, which is exactly what the Genetics area and the next guide on breeding systems take up.
If an inherited condition shows up in a family, the FCI advises mating close relatives of affected dogs only to lines with low or no occurrence of the same condition, and using a DNA test where one exists.
In practice
A breeder loves a particular line for its heads and drive, but honest family analysis shows it also runs a little soft in temperament. Knowing that, they choose a mate from a rock-solid temperament family — pairing the line’s strength with a genuine correction, instead of hoping the problem won’t surface.
(Illustrative, composite scenario.)
Work on it
A few minutes here will teach you more than re-reading the article.
Ask yourself
- When I read a pedigree, am I looking for patterns — or for famous names?
- Do I look at a candidate’s siblings and offspring, not just the dog?
- Can I name what my own line consistently gives, good and bad?
Find out & check
- Find out how the siblings and offspring of a dog you’re considering have turned out.
- Check your line for any recurring fault or health issue you may have been overlooking.
Do one thing
- For one dog you might use, research its siblings and any offspring, and write down what the family reliably produces.
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Sources & further reading
- Fédération Cynologique Internationale — International Breeding Strategies. fci.be
- Orthopedic Foundation for Animals — CHIC Program. ofa.org
- Farrell LL et al. (2015), Canine Genetics and Epidemiology 2:3 — The challenges of pedigree dog health: approaches to combating inherited disease. link.springer.com
- The Royal Kennel Club — Inbreeding calculators. royalkennelclub.com
- The Royal Kennel Club — Health and health testing. royalkennelclub.com
- Lewis TW, Abhayaratne BM, Blott SC (2015), Canine Genetics and Epidemiology 2:13 — Trends in genetic diversity for all Kennel Club registered pedigree dog breeds. link.springer.com
Where evidence is limited, recommendations rest on established practice and expert judgment, and may be updated as knowledge develops.
Next steps
- Read next: Breeding systems: linebreeding, outcrossing and inbreeding.
- Related: Evaluating breeding stock.
- Return to the area hub: Building a breeding program.