Is it possible that there is a new noise that’s scaring him, such as a new fridge, noise from next door or something strange, such as a new piece of furniture. Dogs are funny wee things and anything can set them off. Good luck.
nothing obvious positivelyperf but will keep thinking, he is in the kitchen so i wonder if something spooked him at the back door altough he still goes in his crate during the day for a snooze, funny wee thing indeed.
My dog around 1 years of age started to object to going in his crate to sleep at night even though he had been quite happy to use it up to then. I think he just decided he had 'outgrown it'. Fortunately we had decided we were going to trial him outside of the crate with the view of packing it away around the same time so it didn't matter.