@Eli : no tuna for Haïku, for he already had urinary problems.
And, even if our beloved furry friends like it, it's not a good idea for any kitty. Just a little bit of tuna in very limited amount and at very long intervals might be about OK, but tunas happens to be at the top of the sea food chain. Means they concentrate really high levels of toxics, especially heavy metals like mercury..
Lovely european mackerel tabby , born June '07. He shares my life and fills my heart with joy since end of June '08. The lil' furry darling has enslaved me so easily ;)