I have been bitten a lot by dogs. I am always wary of dogs and regardless of whether my dog is friendly or not I am always aware that other people or dogs may not be friendly in return I am also aware that not everyone likes dogs and big dogs are overwhelming to some children. I find it intensely irritating when people say 'don't worry my dog is friendly'. I recall being pinned to the ground by such a dog before. Some of my friends are very friendly but every now and again some are not. It is the same with dogs. And dogs. My dog is very friendly, but various rabbits might not agree. He is big, by default he can still be frightening.