A large black and white dog is running through a grassy field .
A large black and white dog is running through a grassy field on a leash .
A large black and white dog is running through a grassy field.
A large black and white dog is running through a grassy field on a leash.
The dog is running, but he/she is not on a leash.
The dog is running , but he/she is not on a leash .