How much tuna is too much?
My wife and I have 6 cats. For years now we've fed them either a science diet or some other premium natural type of dry cat food but the vet told us that we should give them something wet. We started giving them tuna a few years back. Each day, twice a day, the 6 of them split a can of tuna. Its the most common size (can't think of how many oz but again, most common size).
We started out with 1 can but my wife saw how much they love it and then started doing it twice a day.
At each feeding, they get about 1/3rd cup of dry food and 1/6th a can of tuna.
So what I'm asking is if this is too much? I'm assuming the vitamin E in the dry food offsets the bad stuff in the tuna but I'm obviously not sure which is what brought me here.
The reason I've brought this up is because of the mercury content but all the articles I read seem to mention polyunsaturated fatty acids not being offset enough by vitamin E. Kinda seems like there would be a basic ratio of how much V-E to Tuna is ok but I can't seem to find it anywhere. The articles all just seem to say, "Don't feed too much . . . but they don't say how much is too much."