I went and snagged that link.
This info is based on the long standing study of John Scott and John Fuller on four seprate breeds in four seperate catagories of dogs and then some inbreed.
They had a colony of dogs that ran from fully soicalized to non and it was done over years and years. The book is Dog Behaviour- The Genetic Basics by Fuller and Scott, it one heavy read.
Developmental Stages
JL