See Which Dog Breeds Are the Most Dangerous, Ranked 

Aggression is not breed specific, contrary to popular belief. 

However, some dog breeds are more aggressive than others.  

Without adequate training and socialization, any dog has the potential to become aggressive. 

Barking, biting, and growling are some of the ways in which aggressive behavior in dogs can be displayed. 

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While knowing the warning signals of aggression in dogs is critical, 

Flea dirt is the popular name for the excrement that fleas leave behind.  

so is realizing that owners have a major impact on their pets' violent tendencies.  

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