DDog is an 11 y/o spaniel, generally quite chilled. He's always barked at the doorbell, but otherwise he's been pretty quiet.
Recently, though, he's started barking in really inconvenient situations, and it's increasing. He barks when we're standing up, or sitting having a conversation, no matter which room of the house we're in. He barks when we're eating food together (although not when each of us is alone). When we're out walking, he barks if we stop. Today again he started barking when DH and I were eating dinner (instead of just begging for food as usual) and he's carried on now that I have come upstairs. In between barking he's dragging his blanket out and chewing it.
His behaviour really looks as though it's driven by anxiety or stress/ excitement. We generally try ignoring him completely, but this gets him more worked up. We tried reassuring him , but he doesn't calm.
I read online about ignoring him then praising him when he's quiet, but it feels like he's not at all receptive, even when he goes quiet he's still tense and then it starts up again.
Any thoughts? He gets several walks a day, time off lead, plus longer hikes at weekends, and there are no other health problems that we are aware of.