What does CD stand for in Hill’s Science Diet?
What does CD stand for in Hill’s Science Diet? The “d” always stands for diet. It was easy in the old days, before there were so many different Prescription Diets. c/d was “crystal diet,” k/d was “kidney diet,” and h/d was “heart diet.” If memory serves me correctly, when I graduated in 1980, that’s all the diets there were. Why is this bag empty and crumpled?