Strong Dachshund

According to the American Kennel Club’s breed standards, "the dachshund is clever, lively and courageous to the point of rashness, persevering in above and below ground work, with all the senses well-developed. Any display of shyness is a serious fault." Their temperament and body language give the impression that they do not know or care about their relatively small size. Like many small hunting dogs, they will challenge a larger dog. Indulged dachshunds may become snappy or extremely obstinate.
Many dachshunds do not like unfamiliar people, and many will growl or bark at them. Although the dachshund is generally an energetic dog, some are sedate. This dog's behavior is such that it is not the dog for everyone. A bored, untrained dachshund will become destructive. If raised improperly and not socialized at a young age, dachshunds can become aggressive or fearful. They require a caring owner who understands their need for entertainment and exercise.
Dachshunds may not be the best pets for small children. Like any dog, dachshunds need a proper introduction at a young age. Well trained Dachshunds and well behaved children usually get along fine. Otherwise, they may be aggressive and bite an unfamiliar child, especially one that moves quickly around them or teases them. However, many Dachshunds are very tolerant and loyal to children within their family, but these children should be mindful of the vulnerability of the breed's back and not carry them around roughly.
A 2008 University of Pennsylvania study of 6,000 dog owners who were interviewed indicated that dogs of smaller breeds were more likely to be "genetically predisposed towards aggressive behaviour". Dachshunds were rated the most aggressive, with 20% having bitten strangers, as well as high rates of attacks on other dogs and their owners. The study noted that attacks by small dogs were unlikely to cause serious injuries and because of this were probably under-reported.