What are the 5 meanest breed of dogs?

Following greyhounds, you'd have afghans, salukis, sloughis, pharaoh hounds, ibizan hounds, silken windhunden, borzois, whippets, then probably Scottish deerhounds - giving you 10.

OR>>>>>>>>> Some mutts.I owned a Mutt that got speed up to 43 mph, and held that speed for a long time!!!!!!!!!

now that i fixed this it is right

1. grey hound

2. border collie

3. Salukis

4. weimeraner

5. Dobermans

6. Afghans

7. Pharaoh Hounds

8. Borzois

9. Scottish Deerhounds

10. Ibizan Hounds