[Help] Two year old dog won't eat her dry food anymore

My almost two year old dog does not care for her dry food. She is eating Acana food and she no longer has any interest in it. I have tried all of the different flavours and she loves it for about 2-3 days and then it's back to not liking it. As a puppy she would eat all of her food within 2 minutes but as she's gotten older she will sniff it and walk away. I have tried taking her out for long walks in the morning so she would be hungry coming home but this no longer works.I have seen suggestions to only leave her food out for 10-15 minutes and try again next meal. However, ever since she was a puppy if she didn't eat in the morning she would vomit bile because she was uncomfortable having an empty stomach. (You would think this would be reason enough to eat food in the morning but it's not).I'm at the point where she gets a treat (can't use a piece of kibble because she just spits it out) in the morning so she doesn't throw up and then just wait and hope she eats all of her food in the day. She's being picky and I do not want to make the problem worse by constantly catering to her princess needs.HELP! via /r/dogs http://ift.tt/2qU7L0T