Our cat, Weasley, used to be an intermittent howler. We found that if we called out to him, he'd come find us, so I think her really was just lonely, maybe not quite sure where we were or he was or something. He hasn't howled in awhile, though. Weasley is 20 years old, and is definitely slowing down. He is pretty skinny, maybe 8 pounds- and he was almost 20 pounds in his "youth!" He is still hopping up onto the couch, his favorite sleeping place and where he spends 90% of his time, and makes it upstairs maybe once every couple of days- I'm not sure if he can still jump up onto the bed. He drinks a lot, and pees a lot. He's having trouble getting his hind legs into the litter box, so we are using one that's about 4" high, but it's still a struggle. Sometimes he gets both legs in, sometimes only one... so we also have a large stock of pee pads, although he is not peeing anywhere else (pooping is a different story, but we just pick that up- dry, firm, easy clean-up). He meows a LOT, much more than he ever did, but I really think it's for company. If we sit and pet him, he'll settle down, purr, fall asleep. He is missing a lot of teeth but still eats both wet and dry food (1.5 oz of wet and a 1/2 c of dry food a day) and eats most of it- and drinks a lot of water. His hindquarters are pretty unstable- he definitely wobbles a lot, sometimes almost falls over, and his back legs are very folded-down (not straight) and he walks s..l..o..w..l..y and kind of low-slung, with his belly pretty close to the floor. He is old, definitely looking at the sunset of his life, but he is just a love. We went through this with his brother, Potter, 3 years ago, so we know what's coming. As long as he keeps eating, is not incontinent, and not in pain, we'll keep coaxing him along and loving him as much as we can.