Having some breeds of dogs can increase your homeowners insurance rates.
Just having a dog does not usually increase your homeowners insurance rates but if you have a breed of dog that is considered dangerous such as a Pit Bull dog then your homeowners insurance will likely increase.
Also some homeowners insurance companies will not even insure some homes if you have a dangerous dog breed and if they do your homeowners insurance will be at least 20 percent to even 80 percent higher in cost than it would be if you didn't have the dog.
Some dangerous dog breeds can and will bite and harm people and then the person who was injured by the dangerous dog can sue you which would cause your homeowners insurance to have to pay out.
If you do not report to the homeowners insurance company that you do have a dangerous dog breed and they find out they can drop you without notice.