Madame Marve addressed Mahdi the Missing Link.
"You must growl more, my boy," she said.

"The people like the growling, it terrifies them, and they talk to their friends about it.

You really must keep on growling.

I don't care if you don't scratch quite so much, but you must growl." The Missing Link pushed his drab muzzle through the bars.
"Keep on growling," he protested.

"Excuse me, madame, but I'm damned if I do unless you give me more beer.