Herd:
* The herd of cattle grazed peacefully in the meadow.
* The farmer rounded up the herd before moving them to a new pasture.
* The herd of elephants marched across the savanna.
Heard:
* I heard a strange noise coming from the attic.
* She heard the news and was shocked.
* He heard the birds singing in the morning.
Sentences with both words:
* The shepherd heard the bleating of the herd in the distance.
* I heard that the herd of buffalo had moved to a new location.
* The children heard the sound of the herd of horses galloping nearby.