Yes, do tell the owners. I had a similar situation with a neighbour's dog, who barked from the minute that they left for work until they returned. After a few days of this, I phoned my neighbour at work, stressing how worried I was about the dog as he was so frantic. It really upset me to listen to him.
Of course, they had had no idea about the barking as they weren't there to hear it! After my hesitant decision to alert them, one of them came home at lunchtime, which helped, but didn't completely resolve matters. Luckily, they moved!
Where would we be without humour?


