I have a 12 year old male Basenji and lately he's been acting strange... he's restless and just can't sit still for too long. Sometimes he'll eventually fall asleep, but usually I get woken up in the middle of the night. He'll lay under small tables or little nooks that he's never been under. He whines and moans a bit... it just seems like something is bothering him but I have no idea what. I don't notice anything else strange with him, so I'm assuming it's something internal. Any ideas?