How Can We Stop Our Westie From Barking – We Have Tried All The Products, But They Don’t Have Any Effect?

We have tried sprays, noises, plug ins, and reward but with no success. Has anyone got a solution please – mainly she barks when a squirrel comes into the garden, at just about all birds, and trees being blown by the wind. This causes her to get very stressed. Even the vet can’t suggest anything else other than going back to training classes. Any sensible ideas would be welcome. She is as good as gold at any other time,.