Spotted Wolf Puppy texture contains unused pixels

The textures of Spotted Wolf Puppy - wolf_spotted_angry_baby.png, wolf_spotted_baby.png, wolf_spotted_tame_baby.png - contains unused pixels. This makes the texture inconsistent with other puppys which do not contain these pixels and it unnecessarily increases the stored image data.

Below I attached current state, an example of one of puppys, image highlighting the affected pixels and fixed textures.