The question isn't specific enough. Any dog can be vicious, it just depends on the environment they are raised in. If their owners are abusive then they might be more aggressive but every dog is kind until they're mistreated.
no, its an anti-biotic that kills most bacteria.
That would be the pet Killer Bees.
most meat eaters and humans kill giraffes for meat and skin.
a dalmation
chocolate kills dogs because most dogs are allergic to chocolate,which cant pass there throut without an allergic reaction
wolves don't have natural enemies but what kills the most of them is humans
Humans
Humans
kills it
Probably a dog,or cat.
No Most people don't even believe in Ufos so no need to be worried
If a dog kills a dog, he was either mad or angery. Or protecting his territory. Felt afendted If he kills him, he wouldn't be dangerous... Not all the times at least. he might just go back to a nice cute dog. or stay mean. It depends.