Green Tripe- How Much, How Often?

Any raw feeders using green tripe? I've been talking with a vet student on another board and she's insisting that green tripe is essential for raw diets. I bought a couple cans today at the pet store to try out. If they like it, I will try and find a local source of unprocessed raw tripe from some of the farms that butcher.

I have no idea how much to give them, or how often to feed it. I'm figuring a once a week type thing like I do with fish?

I also broke down and bought a small bag of Evo red meat kibble to test out. I'm figuring 1-2 meals a week of a quality grain free kibble can't hurt, it'll make it easy on my wife on days I train and I'm not home to feed the dogs, and if there are any holes in what I'm feeding them raw, the evo will fill in. Plus, 4 dogs are going thru about 8lbs of raw meat a day, so if a quality kibble supplement will help contain the costs a bit, I'm all for it. I wanted to test the Merrick Before Grain brand but they didn't carry it (though they had other Merrick brands). I've been reading some people are having good luck with Diamond Lamb and Rice as well, so I might give that a shot.