Parrots Don't Make House Calls (Abby and Tess Pet-Sitters)

This award-winning series features Abby, an aspiring veterinarian who desperately wants a pet but lives in a "no pets allowed" apartment building, and her younger sister, Tess. The girls go into the pet-sitting business and discover new things about animals and new ways to solve problems.
In Parrots Don't Make House Calls, Abby and Tess are expecting a new addition to the family, not the pet they've been longing for, but a baby! Luckily, a pet-sitting opportunity comes up to help take their minds off the baby mania at home.
The girls are invited to take part in an Animal-Assisted Activity therapy program, which uses animal-human interaction to restore people to good health. With the help of a talkative African gray parrot named Chiku, Abby and Tess try to draw a little boy out of his silence. But the boy refuses to speak, and Chiku and Tess do not get a long at all. Will Abby be able to keep the peace? Or will all her hard work go to the birds?