Mako isn't your regular dog. When Bethany Castiller adopted him as a puppy, she had multiple cats already.
This lead to the pup being around cats 24/7 and resulting in him growing to act like a cat, as well.
Think of it as cat software that's been installed in dog hardware. We don't really mind it though, we think Mako makes an excellent cat. Though we must say, he won't complete his cat software installation without that "completely ignoring you when called" updated.
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