I have offered him pureed food that he can just lick off his plate (I even tried a little baby food), but he isn't going for that, either.

I'm pretty sure it's called Mirtazapine. You could ask you vet about that.

Healing vibes on the way to you both! 💓💓💓

Dunno. But I'll keep sending healing vibes.

Did the vet mention these. Do keep giving him fluids. You can do it yourself.

But that deficiency is probably from not getting enough food or water. One vet said I could bring him in for fluids, but didn't mention any home treatment.

I did have a cat years ago that I administered fluid to myself. It was pretty easy.

He could have a sarcoma. Also get a second opinion, possibly a online vet.

He seems comfortable here at home, and I would rather him spend his last days here than going through surgery and chemo.

At his age, even if treatment was successful, I would only be buying him a short bit of time.

it can help to switch to human foods like free range chicken. Boil it and give him the broth too.
No salt.

Couldn't hurt.

I fear hard days ahead for both you and your cat. My darling calico, Annie, stopped eating and regardless of attempts and a variety of foods just stopped. Took her to the vets, tried pastes, tried tuna soup, fed her water and food thru an eyedropper until I felt I was just prolonging the inevitable. Left her outside on the porch glider till she passed . Still miss her, still love her.

God bless both of you .

If he gets miserable, I will ease him out of this world as gently as I can. In the meantime, I'll do my best for him.

It's never easy to lose a friend, especially one we feel responsible for.

give a tsp and see what happens.

It’s an appetite stimulant you rub on their ears.

They sound important: https://www.ctvsh.com/services/blog/geriatric-cats-special-needs

When a family member's cat was near the end of her life due to kidney failure, she loved Fancy Feast lil soups. They're probably junk food so I'd check with a vet, but if you are thinking quality of life you might give them a try. I took in an emaciated older stray a few months ago and he loves them, too. He is up to a normal weight now.

I am getting some of the potassium supplement down his throat, but I don't think I am getting the amount into him the instructions call for (1/2 teaspoon). The first couple doses were pretty easy, but after that he started fighting it and I think I got more on me than in him.

I will redouble my efforts.

It's malty tasting gel high in fat, calories and nutrients that is made for older or sick cats. https://www.amazon.com/Nutri-Cal-Calorie-Dietary-Supplement-4-25-Ounce/dp/B00542UWGG?th=1

Lived on nutrical.
The decision was made after she had a really long seizure. She was epileptic she took meds the vet thought it was the result of a head injury and she was 18 years old.
The last night she was with me before the vet she actually walked on the waterbed(she hated walking on the waterbed without a pillow under her feet) and she hugged me for 21/2 hours she would put her paws around my neck and rub her head on my chin look into my eyes directly than go back to hugs. I was fighting back tears all night.

She was the cat I stole/rescued from those awful abusive assholes.

Oh,Bast how I miss her.

eats very little except in the early morning. Turns his nose up at food we offer him, but does drink plenty of water.

He has thyroid issues and we are using a thyroid cream in his ears.

He doesn't appear to be in pain, begs us for attention, cuddles with one of the other cats.

We are sort of in a wait and see mode. He loves cream so we got him some; he now has decided he doesn't want that.

He did have a bad round of fatty liver syndrome about 8 or 9 years ago which required a feeding tube. I won't do that this time.

Same as you; just keeping an eye on him and paying him lots of attention

However, I am encouraged by some of the suggestions here.

I'm getting some ideas that I would not have thought of on my own.

or whatever you use. I try to eliminate the gristly bits. Puree. Mix a spoonful with water to whatever consistency kitty wants. Years ago. I had a rescue literally oozing pus from eyes, ears, nose, mouth. You could hardly see his face. This concoction truly saved his life. He was crazy for his liver punch and hydrated himself so well, he cut his recovery time in half. Find a way to freeze the excess amount.

He's following me around the house as usual, is active, social. But he is looking really thin.

He sniffed at it, then he walked off.

or inflammation (?) These can interfere with absorption of nutrients, slow down digestion, and negatively affect the gut microbiome. If your cat is dehydrated, it makes it much harder to move any undigested clump along. You might consider adding cat probiotic liquids such as the goat milk formulas for overall digestive health and immune support. Hope things improve quickly.

he had extremely high kidney labs. So he spent the night so they could monitor his intake and output. He also had a UTI so he got antibiotics and an anti-inflammatory injection, and his thyroids were out of whack so we upped his meds. He also got an IV hydration drip. So he was eating, drinking and pooping when we went to get him. Vet suggested we go to Royal Canin kidney formula instead of the Hill's.

He has been eating like a house afire and begging for food - often!!! Best part, he really is feeling better.
We take him every day except Monday for a Sug-Q infusion then he sees the vet again for a new set of labs.

My boy is doing much better. I haven't been back to the vet, but I've been coaxing him with treats and wet food. I've been taking pate-style Fancy Feast and pureeing it, and he eats that pretty well. He ate a little more day by day, and yesterday was his best day yet. He's not eating as much as I would like, but he seems to have broken out of that "wasting away" cycle. He seems happy enough, he is active and wants attention.

I still don't know what the problem is ($500 in tests and they found nothing wrong), but I'm hoping he will pull through again and have some more happy days in his life. He seems headed in the right direction.

Good that your boy is accepting the special diet food. Sometimes that can be a problem. Hope things work out for you all.

Our kitties will enjoy it also.

So glad yours is doing better too