When Iced Cats Sing

There's a kind of iced-cats thing
A running stream seen
Let me explain what I'm spraffing
Why I mean what I'm rapping
If that spring is catsing
Then a tree planted near by
Even as a sapling
Becomes catsing
Which is catching
In fact when cats sing
You could find catsing attracting
Until then I be relaxing
'till the cats come singing in