A wet black dog is carrying a green toy through the grass .
carrying a green toy through the grass .
A wet black dog is carrying a green toy through the grass.
carrying a green toy through the grass.
The first sentence clearly states that it is a wet black dog, but the second does not have a subject and implies that the subject may be you.
The first sentence clearly states that it is a wet black dog , but the second does not have a subject and implies that the subject may be you .