Hill’s has made some changes to some of their prescription diet formulas for 2022. You may notice a change in shape to the kibble as well as an updated bag design. Hill’s recommends transitioning from their current prescription diets to the new formulas gradually, so make sure you have enough of the current diet on hand before Hill’s makes the switch early in March 2022. Please click the following link for the complete details in Hill’s PDF detailing which formulas are changing and their recommendations. Hills Transition Guide