In fact, geese are used to guard businesses such as whiskey warehouses in Scotland and military facilities in Europe. Geese are loud and quick to respond when they hear the slightest questionable noise. Geese naturally understand, without any training, that any people and animals living on the property are part of their flock. They tend to have no fear of challenging a human or animal that intrudes on "their" property or that threatens "their" people and animals. A flock of geese may be an unusual method of home security, but they can be effective without any special training. Brinks Home Security is well recognized for offering professionally monitored security systems. These systems offer the flexibility of either professional or DIY installation. As a partner with Nest, they also allow you to choose between using their own equipment or Nest Secure equipment and monitoring. If you choose Nest Secure, Brinks will provide the ongoing staff and support for that system. Choosing Brinks comes at a premium price, but they do offer financing options for equipment at low or no interest. The monitoring itself is low cost, and it comes with a 2 year warranty although some options also require a 3 year commitment.