Yes, bred is a Scrabble word!
...and is worth 7 points in Scrabble, and 8 points in Words with Friends
bred
Verb
1. Call forth
2. Copulate with a female, used especially of horses
3. Cause to procreate (animals)
4. Have young (animals) or reproduce (organisms)
What Scrabble words can I make with the letters in bred?
3 Letter Words
2 Letter Words