Ok so Lucy has had the poops pretty much since I got her but is testing negative for parasites and worms. I have given her eathborn grain free, earthborn puppy, and now Merrick puppy. I have her on the bland diet and as soon as I start mixing kibble in with it her poop turns runny! Im not sure what is causing this but im concerned! I am wondering if I should try a limited ingredient or not? I need some serious guidance! I am not sure what to try or what could be going on! Someone please help!