On this episode of Outside the Kennel, we sit down with James Chopin for Part 1 of a deep dive into one of the most debated and misunderstood topics in the dog world — COI, or Coefficient of Inbreeding.

This conversation breaks down what COI actually means, how it’s calculated, why breeders use linebreeding, and where the risks begin when genetics are pushed too far. James explains how pedigree stacking works, why certain breedings can strengthen traits while others can increase the chances of health problems, and why understanding genetics is critical for anyone serious about building a responsible breeding program.

We also discuss the difference between tight breedings, outcrossing, maintaining consistency in a bloodline, and how inexperienced breeders often misunderstand COI percentages and genetic risk.