Why do ingredient names sometimes change?

The American Association of Feed Control Officials (AAFCO) determines the list of approved ingredients for use in pet foods. Sometimes, these ingredient names can refer to the same ingredient, but only one name is AAFCO approved. This usually only impacts vitamin and mineral ingredients. For example, Calcium-D-Pantothenate is not AAFCO approved, while D-Calcium pantothenate is, even though they are the same thing. So, you may see a different name in the ingredient list, but that doesn’t mean the formula has changed.