Michael has episodes like that, and when he goes to the Litter Box he howls, and then does his business. I thought he was having difficulty so I got him a laxative, but that wasnt it.
And he can be cross with his Fellow Cats and snap at that which he never did before.
And he will either gobble everything or ignore his food and he never leaves the bed at all.
We are sending prayers for Boo Bear that its nothing serious that hes just lonely and wants you to know where he is. He could be a bit deaf as well and not know how loud hes meeowing.
Prayers for Big Boo Bear from all of us especially the Senior Kittyzens.