Yes, herds is a Scrabble word!

Verb

1. Cause to herd, drive, or crowd together

2. Move together, like a herd

3. Keep, move, or drive animals

Noun

1. A group of cattle or sheep or other domestic mammals all of the same kind that are herded by humans

2. A group of wild mammals of one species that remain together: antelope or elephants or seals or whales or zebra

3. A crowd especially of ordinary or undistinguished persons or things