Looking for a dog for a handicapped child

[Margaret Ripley]

My grandson is blind, has cerebral palsy, but is able to walk, he only says
a few words, but is learning more. He is 10 years old and has just started
to like dogs in the past year, he was scared of them before. His parents
would like a medium sized dog and they need a dog that is already trained.
If anyone has any ideas, please contact me. Thanks.