Two identical brown dogs side by side holding something white in both their mouths.
Two litter brothers fight over a bone.
just because the dogs are identical does not mean they are litter brothers. holding something in both their mouths does mean they are fighting. just because the object is white doesnt mean it is a bone.
They may not be on fight over a bone
The first sentence doesn't say they are fighting. Something white is not necessarily a bone. Identical dogs doesn't necessarily mean litter brothers.