I think any dog is capable of doing what this rot did. I've seen tons of dog bites come thru my ER, and the most common thread is that the parent/owner keeps repeating that they can't believe THEIR dog did this, cause s/he wouldn't hurt a fly. Dogs are instictive by nature, and even though we can train them to a certain extent, they will always revert back to their instincts when put in a situation that stresses them, whether it's that they feel threatened, are in unfamiliar surroundings, their injured or what-ever. I think Rot's get a somewhat unfair label, simply because they are easily trained to be agressive, and alot of people will encourage this behavior.

Erik