My cat all of a sudden started meowing...almost like a howl or cry and then he's super affectionate for a few minutes. He just started doing this a few days ago. My other cat is quite chatty but my other cat has never been like this. He does it at the weirdest times too. He was sitting on the back of the couch between my husband and I and he just let out this howl and then was trying to rub his head on anything he could. Very weird...any guesses as to what could be causing this? He is known to meow for treats and when I get home but its a happy high pitched meow...this is completely different now.