Meant to expand on this, but --
It's like everything with Kristi.
She was "infertile" for 15 years, except no she wasn't. She tried for a baby for maybe 2-3 years and then gave up but is counting from the time a doctor told her she might have PCOS as a teenager. Which is ridiculous. Then she magically got pregnant without help (because she lost some weight and managed her PCOS) and now is jokingly talking about how she'll consider having a second, which is a slap in the face to anyone actually experiencing infertility.
She had the most horrifying, awful birth experience... except no she didn't. She did a series of stupid things that put her son's life at risk to help serve her idea of a perfect birth.
She had the worst mental health breakdown in the history of the world... but she had the money to retreat to the woods, do daily therapy, go on nature walks, and have her husband basically care for her son full-time while she healed.
No one suffers like Kristi.
And now, the one thing her husband wanted -- a dog -- has to be discarded because the dog "went crazy out of nowhere" and tried to attack their son.
The common denominator, as always, is Kristi being the center of attention, the star, the focus, the person everyone needs to drop everything to please and adore.
And, of course, if this story about the dog is heavily exaggerated, Zack can't say anything because it'll trigger her anxiety and her PPA/PPD about their son.
The plan was always to get rid of this dog, which is why she never featured the dog in stories or talked about him. It was clearly her husband's dog, but her husband can't have anything nice.