Choosing a new pet so that your other pet will have some company while you are at work is a fantastic idea. Just keep in mind that your costs of owning a pet will be double , including food and veterinarian bills.
Of course it is important to choose dogs that are peaceful and make easy friends with other dogs. It would be a bad idea to combine a Yorkshire Terrier with a Rottweiller for example, as the Rottie may perceive it as food. You are much better off to pair that Yorkie with a Dachshund who is very sociable with other animals. However just because an animal is small does not mean it is more sociable. Jack Russell Terriers have been known to kill other pets simply because they are jealous of the attention they are getting from the owner.
There are some dogs that are hard wired to see smaller furry creatures such as cats as prey
Watchdogs and guard dogs do not necessarily make the best pets. For one thing, the instincts that make them such good guardians are the same ones that compel them to attack strangers or even a member of your family who may accidentally come too close to you.
The best guardians are usually the dogs that qualify as alpha dogs. They respond well to training but untrained they can attack loved ones and strangers, make a shambles of your house and yard and incur lawsuits for noise, injuries and damage to other people’s property.
Guard dogs and watchdogs usually comprise the larger breeds such as German shepherds, Bull Mastiffs and Akitas. This means that they can easily overpower a small animal or child. Most of them also tend to shed quite heavily and do not make great house residents.
Some smaller dogs such as Maltese, Daschunds and Yorkshire Terriers do make keen watchdogs but they are not really capable of defending you in case of an attack. In fact some little watchdogs, such as the Pomeranian are more likely to sound the alert and then make friends with the intruder.
The key is to choose the dog according to what you need as security. As a rule of thumb the larger and more ,alpha, the dog is the better he will be at protecting your person and your property. The smaller the dog the more likely he is to sound the alert not only when real threats appear but also when he perceives just about anyone approaching you or your yard. Some animal owners find this tendency for small dogs to bark at the drop of a hat to be very irritating (and so do the neighbors.)
Owning a pet requires self-discipline and responsibility. Unfortunately many people adopt athletic larger dogs that need plenty of exercise and then drop the dog’s walking schedule as easily as they do the latest fad diet. If you are going to adopt a dog of a breed that requires plenty of exercise then make sure you are ready to commit to walking it at least three times a day for the span of its entire life.