Shih Tzu

Hello, I have a 3-year old Shih Tzu which I had been feeding Purina but after reading about the junk in many commercial dry foods (which I'm guessing is why my dog is always itchy and rubs her head on the carpet), I went out and bought Orijen Adult dry dog food today.

I'm just wondering if this is a good choice for smaller breeds like Shih Tzus. DogFoodAnalysis states: "The only caution we would make on this food is that the high protein content may make it suitable for adult dogs only, particularly in the case of large breeds."

Also, I have a few other questions... I usually have to hand feed my dog her food. She'll be hungry and stare at her food, but won't eat it until I shove a kibble in her mouth, which she'll spit out a couple of times before eating a handful. Sometimes she'll start eating from her bowl after a while of doing this but it seems that she'll eat less that way or prefers handfeeding. Not sure why this is... was it due to the Purina dog food or something else? She's still hesitant eating the new Orijen dog food, which I have mixed with Purina, but hopefully this will change the next few days after the transition.

The Purina dog food kibbles are also pretty small relatively and I notice she just swallows it without chewing... is this normal? The Orijen food I bought is much bigger so I see her chewing it.

Thanks!!