Miniature Pinscher
This tiny dog is very possessive with its food and toys and is willing to fight a child if they feel their food or toy could be taken away. They’re also dominant and aggressive with other dogs but are ok around cats.
Japanese Tosa Mastiff
Some countries have banned these dogs from being kept as pets because they were historically bred to fight. They’re described as being fearless and aggressive even with their owners. It wouldn’t be safe to have these dogs around your kids.