The two cows were grazing with his head down
The two cows that were bending their heads to eat were brown.
Two cows poked their heads to eat something.
The sun shone on the heads of two cows that were eating.
The two cows were feeding with their heads down.
Two brown cows were eating their food with their heads down.
Two yellow cows were grazing with their heads down.
Two yellow cows are eating the food in the trough.