We went through a whole big bag of Canidae and then got a smaller one so I could switch over slowly to a different food. Kiah had a lot of other issues with Canidae, hair loss behind her ears, vomiting, and terrible eye boogers besides the runny poo so it had something she was allergic to. It seems to me she did worse on foods that had chicken in them rather then salmon or fish (although she did not do well on Timber Wolf Ocean Blue either).
I fugured that if she was pooping so much she can't be retaining alot of nutrition so that is one of the reasons I changed her food. Hope you find something that works well for Bruce.