http://www.kittykaviar.com/

I put some on her dried food every morning.

It is made from Bonito which is part of the tuna-fish family and I've heard that there is something in tuna that is bad for cats to eat on a regular basis.

The webiste promotes the snack as being a healthy supplement for cats (but advise not to use it as the primary meat ingredient in a cat's diet). However, is there something about bonito flakes that could be bad for a cat's health?