Helping my 14-year-old cat put on some weight

Hi everyone,

I would really like my 14-year-old cat to put some weight back on, as he's lost quite a bit of his 'bulk'.

For instance, you can see his spine now, whereas you couldn't before.

I should point out that he's in excellent health for his age, but he's becoming a very fussy eater.

He only eats dry food (I add a bit of salmon oil to it) but only in very small amounts.

I've tried giving him wet food instead, but he doesn't eat any more of that either (about 2 teaspoons worth).

Are there any high-calorie wet foods available?

Thanks