Has Stan's Donuts changed their donut recipe? She doesn't like it.

Last week, someone gave Zinger a glazed raised donut and a cinnamon roll from Stan's Donuts without telling her where the donuts were from. Zinger ate the donuts and they were good but she didn't think they tasted like Stan's Donuts. Then she found out that those were Stan's Donuts. But those donut's didn't look nor taste like Stan's. They were not as dense and the texture was not the same as before. Has Stan's donuts changed their recipe? She needs to try their donut again to confirm this. She doesn't like it.