The dog see's a reflection of him with the bone and thinks it is another dog with another bone.
His own reflection
A dog fetching a bone is a fine example of a treat. (for the dog)
The Dog and the Bone is one of Aesop's fables
A patient dog eat the fattest bone
A dog fetching a bone is a fine example of a treat. (for the dog)
Given the Dog a Bone was created in 1980.
The "dog and bone" is rhyming slang for "phone". Practical application: "Will ya shuddup, I'm on the dog and bone."
It means your happy just like a 'dog with a bone' to chew on.
Dog Mud Bone
The dog bone is not repairable, simply replace it.
Dog
Dog and bone is cockney rhyming slang for phone (telephone)