What did the thwaites tell roald dahl that liquorice bootlaces were made of?

He said it was made out of rats blood, mashed up and made into black strips. He also warned Roald Dahl and his friends not to eat it for it would cause Ratitis. Thwaits explained that his Father said that rattitis will will make u grow a tail and long tail, meaning that you will look like a giant rat (I don't think Ratitis is a real thing, is it?). This is what it said based on the real book: "The two men who were doing the stirring with the long poles now

put on their Wellington boots and climb into the cauldron and shovel the hot rat-MASH out on to a

concrete floor. Then they run a steam-roller over it several times to flatten it out. What is left looks rather

like a gigantic black pancake, and all they have to do after that is to wait for it to cool and to harden so

they can cut it up into strips to make the Bootlaces. Don't ever eat them," the father had said. "If you do,

you'll get ratitis."

"What is ratitis, Daddy?" young Thwaites had asked.

"All the rats that the rat-catchers catch are poisoned with rat-poison," the father had said. "It's the

rat-poison that gives you ratitis."

"Yes, but what happens to you when you catch it?" young Thwaites had asked.

"Your teeth become very sharp and pointed," the father had answered. "And a short stumpy tail grows

out of your back just above your bottom. There is no cure for ratitis. I ought to know. I'm a doctor."