Long story short—Rexie is 2 1/2 yrs, got him at 3 1/2—4wks, unweaned, of course; and I am Mommie.—Shirley
Wow.—kitkat

Siamese tend to vocalize a lot, and he could be missing his buddy. But if it is a change in behavior, that warrants a vet visit. Cats are masters at hiding their pain, so the first thing you should always do is check with your vet to rule out physical problems, and then once you’ve done that you can work on changing unwanted behavior.

BTW, drinking plenty of water doesn’t necessarily mean that the kidneys are OK - sometimes it is even a sign of kidney problems.

Hugs,—CatNipped

I’m sorry for your loss. Well then, if you know it’s not a physical problem then I would suggest any or all of the following;

1) Play with him a lot right before bed to tire him out.

2) Feed him right before you go to bed after 1)

3) Use ear plugs and a hepa filter or some other form of "white noise" after 1) and 2)

Hugs,—CatNipped