I posted on the new members forum.. Had like 47 views, but no answers

My 3 month old GS was on Eukanuba large breed puppy food, she has itchy skin, no fleas... I've heard a lot of good things about Nutro dog food, so I switched.. Suppose to be great for the coat, skin, plus more healthy diet... Any thoughts on this please??
Also... I'm giving Addie bully sticks.. She loves them... Also am learning that rawhides aren't so good for them..
It's is are first time with a GS, we've had dogs before, but she is by far the smartest, and quickest learner. Thanks