Ours is 19, has gone blind and deaf (at least mostly, we think she still sees bright light and deep dark shadow contrast) but, she still has one hell of a sniffer on her.
We get some feline lysine in a tube to add a little to our girls food in the evening. Our vet said the lysine and taurine are good for her, may want to verify for your situation. We keep some Temptations Purrree tubes around for an in-between meal hearty snack.Then we found a Bonkers hard treat with taurine too.
And of course catnip, cat grass, and little bits of un-seasoned protein treats when we are cooking (bit of chicken, tiny piece of steak). We’ll actually cut a lil pice off and set it aside before we season, then give it to her cooled as we go to eat. High protein is no longer good for her, but she gets so happy for her little nibbles we can’t help it, and it isn’t very often.
I’ll need to check out the Forza, maybe replace some of her temptation snacking with a little of that. She doesn’t eat a whole lot at once, and due to a dog and greedy little brothers, can’t really have food left to reach easy thus the regular snacking.