Or more likely because very young dogs would grow some basic traits of character while influenced by the behavior that their parents exhibit in front of them.

For some reason, I assumed that the animals were not brought up with their parents.

Puppies are supposed to be separated from their parents no earlier than about 6-8 weeks old. Critical socialization time is the first 3 months of their life. (Or so. These numbers vary by region and amount of caring; I'd rather have the puppies spend more time with the mom than less.)

Interesting. TIL

Are you trying to point out the missing Oxford comma?

Haha no, did I misunderstand because of the absence of a comma?