Solid or Liquid?

Sleeping here in front of me,
Is Pasha- curled up awkwardly.
His hind legs stretch far out,
His tail's nearly in his mouth.
His forelegs emerge from under his bottom,
It's a wonder how there he got 'em.
Momentarily he opens his eyes,
And then sleepily he sighs.
He lies curled up on a foot of mine.
I wonder if he's got any spine.