My elderly male cat has began pacing and yowling all night. He has arthritis but this doesn't seem to be bothering him. He has a hard time settling down and eats little but now ignored the other cat in our home whom he's lived with for years, I even tried letting him up with me which he once loved to do. The only change in our home is the other cat is now allowed to sleep on the back of the couch that I'm on, could this be why he's been so unsettled for 2 weeks?...I had a feeling this wasn't a free service but can you say that your answer to my problem is the solution and not one of the many I've already read on line?