Is it me or does ALL of his dogs have the same types of designs? As if they were all his offspring. They all look like the same breed, have the same few kinds of markings and colors.
Then I thought, is it actually confirmed that Hakuro only has 4 sons? Perhaps he's like Kisaragi and has an incredible amount of sons.
I mean, just look at the random dogs in his pack. They all look like they could be his sons
These are his 4 sons:

Here's some of his random pack members:



What are the odds of ALL the members of Hakuro's pack are the same breed and looking related to him!