Tuna? Is it ok?

I just wanted to know if tuna is ok to feed to kittens? Ella seems to eat a little of it..she's making a little progress. 

It is OK as such. Although too much raw fish isnt not recommended.  Excessive raw fish destroy a B-witamine, in unlucky cases they got seriously sick  (the disease called yellow fat if I remember correctly - unpleasant disease).

Although some cats manage rich fish diet.  As we all know, there are cat populations living more on less on fish...

So, tuna a couple of time a week is entirely OK.  If you want to give it more often, be sure she gots extra vitamine E.  - that is the remedy against this B-vitamine destroyer mentioned above.

Good luck!

ps. When you ask about kitten, you DO mean kitten?  My answer is about adult cats, where I know this for hard facts even if I dont remember all details.

For kittens Im not equally sure. Although my guess is, it should be the same. 

Ie very small portions, or  maximimum twice a week.  If you give extra e-vitamin, may be somewhat more often.

Thank You. And yes, i do mean Kitten.

AS Stefan says, tuna (as sold for humans) s not good in large quantities, for the reasons stated. But as an occasional treat, or to get a sick cat eating (they love the smell) it is very useful. But never give the versions in oil or with salt - buy the all natural version in water, and if you can only get it in brine then wash the salted liquid off first.