Yep, I'm constantly switching my dogs' kibble. Basically every time I have to get a new bag. There are a few brands that I tend to rotate through, occasionally we'll get something completely different. My dogs have never had a problem with it. I think the digestive problems occur when people feed the same kibble for a long time, and then try something different.
Ryker: (USDAA) SR (DOCNA) C-BTA C-ISLA
Solstice: (AKC) AX AXJ (USDAA) MPD PJM PGM PKM APS APR (DOCNA) C-IAA C-IGA C-IJA C-ISA C-ISLA C-ITA C-BAA S-BSLA S-BJA S-BTA