Another Thing...They send the birds to the vet because they bought them from the pet shop and now they are pulling their feathers and refusing to speak.
Parrots don't always speak, especially not those that have had a terrible, traumatic start in life.
Can I just finish by saying that I deal with several Qataris who have parrots and are the best owners. They treat their pets with love and attention and then, in return, the parrot speaks to them. Not all parrot owners are bad, just the people who want a talking fashion accessory.