Need help with food choices

As the title says, I need help with picking a food my 10 month old will actually eat. I've tried Pro Plan (all proteins), Hills (all proteins), Royal Canin (only the puppy food - so far), Purina One and I even tried Costco brands. She started on Iams large breed puppy but once she got home, it was also a no go. I've tried all puppy foods and all adult foods.

She'll eat something one day and hates it the next. Yes, I try my best to transition but it doesn't really work since she doesn't like the original. I've tried just about every topper out there and again, she likes it one day and hates it the next. I've tried adding different canned foods but if she does eat that, it makes her poops mushy. I can't even imagine how much money I've spent trying to find a food this girl likes.

She isn't skinny - she weighs 120lbs so she is getting nutrition - just not constantly. And no, I can't leave food down for her to pick at when she wants to eat. I have an 11 year old Dane and 10 year old lab mix that are very food motivated. I try to offer food off and on during the day but she sticks her nose up and walks away. Folks say she'll eat when she's hungry enough but instead, she just doesn't seem to mind throwing up bile.

I'm looking for anyone out there that has a picky girl like mine and actually found a food - a healthy one - that you've finally found that works. Please.