I have a thirteen year old mixed breed dog. We've had him since he was two. When he came to us, I crate trained him and trained him to sleep alone. It took about a week until he wa happy to sleep in his crate in the hall.
We moved house when he was around 6/7, we didn't have a hall anymore so he slpet in his crate in the dining room. He was fine with this, made no fuss. The house was smaller so once he was all settled, I swapped crate for a bed.
We moved again about three months ago. I put his bed in the living room. All was fine. Until last week, when he started howling in the night. I allowed him to sleep in my bed. This is something that's happened before, i.e if he's been ill or frightened by strong wind/fireworks/heavy rain etc. He always goes back to sleeping fine the next night. Only now he's not. He howls every night. If I leave a radio playing for him he is more settled but I can still hear him pacing and whining. In the last day or two it has expanded to him howling during the day if I leave the house. This is something he has never done. He's always been happy to chill in his bed with a Kong for a few hours.
His routine is the same, we still walk in the same places, I can't identify any frightening noises. There are windchimes and a fountain he can hear but he could hear those when we first moved in.
Any ideas on what might have caused this? Or how to stop it other than buy a new crate and go back to basics.