Finally it seems like I've figured it out! I didn't really think too much of changing her food for a few reasons...one, she loves it...two, it's a really good food! Seems she couldn't handle something in it...thinking maybe the protein level? But finally, she is doing awesome on Regal Puppy-a local store and I went over a bunch of food and she swore by Regal so I gave it a try and instantly she is doing better! Hasn't anyone used Regal or have thoughts about the food? Thanks!