Hey Rachel,
I don't know much, but large stools is a no-no. Especially if it's LARGER than what went in - I mean, how did that happen? So disappointing, for Canidae to drop so low. They were once one of the top guns, now I hear people complaining left and right.
I changed cold turkey from Science Diet to Orijen. Both my dogs never had any problem with the change like loose, watery stools and whatnot. It's been about 2 weeks, and already you can see improvements on my dogs, top to bottom. The most evident will be in their coats - my Yorkie Mocha who eats regularly and cleans her bowl every time, has such a nice coat now! Shiny and "falls" very nicely on her body. My shihtzu Lulu who is such a picky eater she won't eat for 2 days if she does not like the taste of some food, well, suffice to say she eats EVERY DAY now, without fail. She has white/blonde hair, and I noticed the past 2 weeks, her white coat is whiter now it's snowy white, her fur is not so dry anymore, and she actually asks for food, when before, food for her was a take it or leave it kinda thing

Their pee smells way less strong, so is their poo.
So many people in my country say, dog food is a gimmick, it doesn't matter what you feed a dog, some people feed their dogs Pedigree and the dogs lived to 15 years.. Well, I have never fed Pedigree so I wouldn't know, but I believe my dogs won't, and can't lie. I'm so grateful that I listened and looked around. Good food - great dogs. To risk sounding like a commercial, seeing is believing
Other food around here that people have recommended:
Innova Evo
Nature's Variety Raw Medallions
Orijen
Merrick
Wellness
Good luck finding new food for your babies