The original sentence is almost correct, but it sounds a bit unclear because of the way the possessive forms are used.
Here is a better way to write it for clarity and grammar:
- Sheep know one another's voices and their shepherd's voice.
Explanation:
- “One another's voices” means the voices of the other sheep.
- “Their shepherd's voice” means the voice of their shepherd.
- Using “voices” (plural) for the sheep and “voice” (singular) for the shepherd makes it clearer.
So this corrected sentence helps show that sheep recognize the voices of other sheep and also the voice of their shepherd.