Giving your cat Albacore Tuna is okay as long as you don't give it too much. Health problems may occur if it's given as an everyday meal. Once or twice a week shouldn't be a problem. Just remember cats are like humans each individual cat will have different results. Just pay attention to it's actions and everything should be ok.
My cat loves tuna too! However, I do not feed her tuna everyday. I believe it is better for animals to have variety in their diet. If you fed your cat nothing but tuna for an extended period of time, I am sure it would be lacking other nutrients and vitamins.
Yes. But they should also be eating a good brand of regular cat food to ensure that they are getting all the nutrients that they need. Simply eating tuna would not be a balanced enough diet for the cat.
Yes, albacore tuna is safe for cats to eat. However, you must make sure that the tuna is packed in water, and not in oil. Additionally, never let the cat eat out of the tin, as cat could scratch the inside of his or her mouth.