Headscratchers / Dot and the Kangaroo

• Why is there no blood in Dot's coral wound in Dot and the Whale?
  • Bloodless Carnage perhaps?
    • Same goes for Funny-Bunny in Dot and the Bunny as he gets his hind feet bit by crocodiles and doesn't suffer as much as a scratch.
• How could Papa Drop's son Roley in Dot in Space possibly know of the existence of rabbits when the species isn't native to Pie-Arr-Squared?
  • Maybe Dot wasn't the first person to visit the planet.
    • That just implies that some other person/animal (somehow) got stuck on Pie-Arr-Squared before Dot and never escaped.
• Could it be possible that wormholes exist in Dot in Space and Dot's rocket just happened to pass through one? How else could the shockwave from the destruction of Whyka's rocket cause Dot's rocket to end up in another Solar system i.e the one where Pie-Arr-Squared is? Obviously we don't see this happen on-screen as after the explosion, we just see Dot buried under metal piping and Whyka rescuing her and it's only after this that they see they're approaching a planet which they don't realise is actually Pie-Arr-Squared until they actually land on it. This is just my theory.