I have a 3 year old Cavoodle who barks at nothing! We leave him outside in the day from about 9-3 and he sleeps inside at night. He barks when we are in the pool and if he hears a dog barking in the distance (which is understandable, I guess!) A neighbour put their head over the fence today and complained that he hadn't stopped barking all day. Other neighbours have apparently also been complaining, however when we have asked they have said they never hear him. We could leave him inside throughout the day, however it isn't ideal when temperatures have been reaching 40 degrees. We have also heard about the no bark collars, are they any good? Do you know of anything else that could work? We don't know what to do!! PLEASE HELP!!