Like I said. Plantigrade/Digitigrade is the
foot not the leg. But, if you look at the skeleton of a dog, their front legs have that same bend in them, it just looks higher up and is less visible due to the ribs and chest cavity.
So both the front and back legs of a dog are, indeed, digitigrade. However, the picture you shared shows a purely plantigrade design due to the fact she has visible heels.
