Eight weeks is an excellent age to pick the dog up and it MUST live in the vicinity of the birds...not in the house and have as little human contact as is necessary to provide food and water..no petting or even talking for a while.Exciting!
If the pup could have been born there with the birds, that would have been best but eight weeks will work if you can force yourself to leave it alone and NOT make it a pet. just MHO.
At the age of 4 years, I'm going to let my Heeler beotch have a litter this spring...in season now.