Having little green kittens about something [closed]

I was very surprised when I first came across this saying. Using google I've found a total of two instances of it, and dictionaries or ngram come up empty.

My wife is having little green kittens about me going solo tonight. [he is asking for someone to join him] link

I'm also reasonably sure the EU would have had little green kittens over this idea. [poster is expressing his doubts on the truth of a news article] link

In both cases the context suggested it means to be strongly opposed to something or [edit] to freak out.

Is this an existing expression? Does anybody know where it comes from?

Edit: apparently, some people prefer blue kittens:

I've always heard the expression "Don't have little blue kittens!" as in don't get all excitable, but I've never actually seen a blue kitten! link

The expression to have kittens meaning to lose one's temper only dates back to the beginning of the twentieth century, so the chances of its dating back to some age of primordial ignorance when women actually feared giving birth to feline offspring approach zero.

Those puzzled by the origin of the expression have apparently never witnessed a cat giving birth. It is not a quiet affair. The adjectives "little green" simply augment the expression and give it a rhythmic ring.

There's an existing expression in British English "to have kittens":

"TO HAVE KITTENS - For anyone to confess 'nearly to have had kittens' is a dramatic way of admitting how anxious and scared he had been. For us it is just a metaphor, and no one would dream of taking it literally. Yet the phrase itself goes back to times when women were really worried that, instead of giving birth to a child, they would bring forth kittens.
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