Bonus chapter! Heck yeah! You're the greatest! 

Percy is such a little snot. I know he's 11 but I kind of want to slap him. He's lucky Snape isn't at Hogwarts. He'd take him down a peg or twelve. 

I think it's great that Harry is as curious about Prof Snape as the Weasleys are curious about Kuya Severus. Each party has such a difficult time wrapping their minds around Snape in another context. That's how it is with kids and adults, particularly kids and teachers. 

The Weasleys being shocked at Snape's blood status certainly rubbed Harry the wrong way. With good reason. I'd expect more from Bill, but I guess he's still pretty young too.  I suppose that's a testament to Slytherin and Snape's persona. 

Snape's summoning charm on Scabies (new name is sticking btw) failed because it's Peter.  Will Severus work it out that Scabies is an animagus?

Harry being triggered by the word 'donor' makes perfect sense. I feel bad for the kid.  It would freak me out too.

Ah, Percy - accusing Harry of fame. Yes, the Weasleys would be curious about Snape's background. And no, Accio a rat wouldn't work when it's not actuallya rat being summoned.