Fucking attack dogs are getting worse and worse all the time.
say that 60lb dog is going after 260lb male.. Basically equivalent to a 200 pound male wanting to kick the crap out of a 800 silverback.
A good dog taking on something 4X it's weight. Man's best friend. Granted little dog, doesn't have the strength to really 'get' some like a 200lb bull mastiff, but it defended it's owner.