Grain-Free, Fish-Free options in dry food

Hi all, first post for me.  I'll try to keep it brief. 

We're long time cat owners.  Our first was Katie, who lived to the age of 17, fed a diet of assorted dry supermarket brands.  After Katie died, we adopted Cassie and Sadie as 7-week old kittens.  At that point, I decided to feed the cats a healthier diet and started them on Science Diet's Nature's Best food.  Cassie died at 6 from severe kidney failure.  After Cassie died, we adopted Mia who has always had a loose stool problem from the day we adopted her.  The vet suggested she might have a fish allergy, and suggested avoiding all fish.  We switched the girls from the Ocean Fish Nature's Best to the Chicken Nature's Best and that helped Mia's bowels. 

We were trucking happily along with the two of them, and then Sadie (my avatar) died last month at 9 from pancreatitis after two weeks of constant hospitalization, tests, and thousands of dollars spent.  It finally occurred to me that maybe the Nature's Best was a problem.  So, I've been doing a lot of research and I'm finding that a grain-free food is highly recommended if you're going to be dry-feeding, which we are.  Mia, our sole survivor, doesn't really love canned food, although she does eat a tiny bit each day. 

However, I'm finding it almost impossible to find a grain-free, fish-free option.  Everything has herring meal, or anchovy oil, or salmon meal somewhere in there, even if it's listed as a chicken or turkey flavor.  The one that looks to be pretty clean is the Merrick Before Chicken food.

Opinions?  Am I overreacting about the Nature's Best?  We're still reeling from losing our baby girl.  Are those of you who are feeding the BC finding that your cats are doing well on it? 

Any input and advice will be so greatly appreciated. 

Okay, so I just re-read the ingredient list and found salmon oil, albeit pretty far down.  Now what?  Any other suggestions as to fish-free, grain-free?

Thanks again.

Thank you for all the input.  I have samples of Natural Balance Chicken and Duck coming, but in the meantime, I thought I'd try the Before Chicken.  She absolutely LOVES it.  Unfortunately, she loves it to the exclusion of the attempted transitioning from the Nature's Best.  She won't touch it; she won't even touch the BC that's mixed with the Nature's Best.  What a stinker!  So of course, we're having loose stool issues now.  And I have no idea whether those are a result of the fish allergy and the salmon oil in the BC, or if it's just the new food introduction.  We'll give it time and see what happens. 

Thanks again!