It depends on the dog and the owner and how a dog is trained. I have an extremely high prey-driven dog, but I taught him to be calm around the ducks. I use clicker training to train(so I don't use physical or verbal punishments).
Session Six(three months ago):
In total, I think we had about ten or fifteen sessions similar to the one above(but outside).
This picture was taken yesterday:

Session Six(three months ago):

In total, I think we had about ten or fifteen sessions similar to the one above(but outside).
This picture was taken yesterday: