He's upset by everything. Nervy, jumps at anything.
Barks at everything, yesterday it was a feather. Cats, squirrels, birds. Barking at workmen, very territorial about the garden
Barks hysterically at the fox who runs down the side fence.
He gets really upset and shaky when he senses the fox.
Sometimes he's actually sick, he's that worked up.
What can I do?