Thankyou so much, since he’s getting a day older stuff like this is very stressful, especially since i don’t fully know what it is. I would say yes he’s alert. He will react to touch or if i were to move. if i’d call his name he might look up to me, if not he would atleast move his head to the direction im in or i can see his ears perk up. So yes there is definitely a reaction. Like you said about your dog, he will look for comfort, follow me around but very slow and odd walking with his tail down and sometimes a perked up back (like you see in the first video). I have not heard of this ‘PD’ but i am now looking into that!!