Chaco  is a parrot that Doctor Wooff rescued from pet smugglers. His perch is next to Miss Nellie and he greets patients as they come in.

He speaks Spanish, German, Italian and French and loves to irritate Miss Nellie by imitating the phone ringing.

He always thinks he has to have the last word. When he gets agitated or suspicious of someone, especially when he can sense an abused animal entering the clinic, he starts pulling on his feathers , and sometimes he doesn't stop till they fall out and he does this with a very loud squawking noise to make everyone aware that something is wrong…. He collects nuts in all shapes and sizes and loves to whistle and to sing the songs he hears