My 7 month old gsd has been eating bluebuffalo for like 3 months 3 weeks ago I switched to the regular adult kind instead of puppy. It's the grain free type. She does get into people food and stuff and was just treated for giardia and worms last month which went away. She seems to consistently have real runny poop. Before getting treated it wasn't this bad. I'm just wondering if it's the brand of food or switching from puppy to adult or effects from being treated with the meds. She seems healthy and happy otherwise.