A black dog chasing a red ball through the water .
Rex fetches his ball from the lake .
A black dog chasing a red ball through the water.
Rex fetches his ball from the lake.
There's not enough evidence in the photo to determine that the dog's name is Rex and we cannot tell if the water is a lake or another body of water.
There 's not enough evidence in the photo to determine that the dog 's name is Rex and we can not tell if the water is a lake or another body of water .