California animal rescue officers were called in after an eight-month old German Shepherd dog mysteriously got his head stuck in a wall.

Stricken hound Rebel was found whimpering with his head sticking out one side of the 45 centimetre thick wall in Desert Hot Springs, east of Los Angeles, while his body remained firmly on the other.

"My initial reaction was, 'Wow, how'd he get in there?'" said Riverside County Animal Services Sergeant James Huffman. "And why is there a hole that big in the wall?"

"It was a very odd situation .. It was uncertain if he was chasing another animal, or just curious," he added.