Guides for breeders
Practical explanations of the rules and terms breeders deal with every day – with examples and links to official sources.
- GeneticsCoefficient of inbreeding (COI): what it means and how to read itWhat the coefficient of inbreeding (COI) is, how Wright’s method calculates it, typical values for common matings and why the number of generations matters.Read guide →
- Breeding rulesFIFe cat breeding rules: litter limits, mating intervals and kitten rehoming ageHow many litters a queen may have under FIFe rules, how the 12- and 24-month periods are counted, when a second male may mate her and when kittens can leave.Read guide →
- Shows and titlesFIFe cat show titles: how many certificates you need for CH, IC, GIC and SCFIFe titles for entire and neutered cats: how many certificates, how many judges and how many countries you need for Champion, IC, GIC and Supreme Champion.Read guide →
- GeneticsCat EMS codes: how to read colour, pattern and eye colour from a FIFe codeA guide to the FIFe EMS system: how a code is built, what the colour letters mean, the s, y and t modifiers, and the number groups for white, tabby, points and eyes.Read guide →
- GeneticsCat colour genetics: the key genes and how to predict kitten coloursHow black, chocolate, blue, red and tortie colours, tabby patterns, silver, white and points are inherited in cats – and why kitten colours cannot be predicted exactly.Read guide →