Is tinned tuna good for cats?

Cats tend to be fussy eaters, so we trust them to only eat food which agrees with them. Most cats love tuna and being high in protein and Omega 3 fatty acids, is good for your cat.

However, tuna lacks many of the other essential nutrients a cat needs every day, to keep them healthy. Such as Vitamin E or calcium.  It also contains levels of mercury which, if consumed regularly can be very harmful to your cat. Even as much as one can a week can be harmful to a small animal like a cat. Mercury poisoning can cause muscle weakness, mental disturbance, memory loss and visual impairment. 

In short, tuna should only be given as a treat and only if it comes in spring water, not oil or brine.