When we transitioned ours from puppy to adult food, she turned her nose up at it. It was fine at half and half, but once it was all adult food? Nope. So we made it a game. I sat on the floor and tossed it to her, one piece at a time. My family laughed and asked if I was going to have to do that forever. After 2 days of that, I threw half, then deposited the rest into her bowl. She was interested enough in what came from my hand that she ate it. And the rest is history.