In addition to the potential for her improving her immune systems, there are numerous other secondary health benefits to having a four-legged companion. With the commitment to walking her dog on a daily basis, they can help keep you fit and active. This in turn can help her lose weight and also potentially improved her social life because of interactions with other dog owners. Having the companionship and unconditional love of a dog can add significant meaning and purpose for individuals that are now empty nesters and even help prevent the onset of depression. There are many studies that have proven that owning a dog can also help reduce hypertension. Of course there are now many different breeds that are being trained to assist individuals who have physical and mental challenges, better known as service dogs.