Originally posted by SpencerTheLion:
Short answer: I free feed Nutro or IAMS dry food with fresh tuna 1-2 a week.

When it comes to pet nutrition, I am by no means an expert. If liver was a once in a week treat (which is what I do with tuna), it would not seem to be a problem. Keep in mind the better cat foods have the vitamins and minerals cats need. Taurtine, for example was discovered in the late 1980s to be good for a cat's eyes & heart. So taurtine was added to cat food. A rescue webite in Colorado recommends a lot of fresh meat, but I'm afraid to try. What they are doing may be very sound, but it would seem vitamin supplements probably should be added.