When will the seven-star dog king choose?

Seven-star dog king was chosen when he was 30 days old. Seven-star dog king for 30 days. At this time, you can basically see the dog's appearance. By the full moon, your eyes will emit a unique color. So this time is very suitable for selection. Seven-star dogs are smarter, fiercer and braver than other dogs. The first of the seven-star dogs is the future emperor, and the strength of the strong is doomed from infancy.