A dog testing the waters is not a dominant dog. Like I said, from 6-10 months is the first rebellion stage. It's a completely normal part of puppy development. But aside from debating whether or not Chloe is dominant or fearful or disrespectful, the problem is that she's protecting her food. The only way you can successfully remedy that is to have a concrete "Give" or "Drop it". The best method is not to correct her when she growls but to prevent her from putting on the defense at all.

Give her a yummy treat and then take the resource away. Repeat repeat repeat. You, of course, will be the main trainer, but encourage your family members to help you every once in a while. Say, have your family gather together for 5 minutes once a week and help train her. If they aren't willing to help, warn them that Chloe's snaps could becoming skin-breaking lunges and that's not exaggerating. I made this same mistake with my first dog and he broke skin several times.

As long as you have a concrete "Give" and you practice every day, Chloe should listen no matter who's commanding and no matter what she has in her mouth. "Give" is the single most important command I've taught Ivy and she listens to my trainer, my parents, my friends, and she listens no matter what is in her mouth - even a raw bone. If crazy Ivy can do it, Chloe should breeze through it!