Consider the time and money that will be involved with a second dog and be sure that you have adequate resources to provide proper care. A second dog will mean twice the feeding, grooming, walking, training, veterinary care and twice the expense.
Step 2:
Think about why you want a second dog and make sure they are the right reasons. Don't get a second dog to keep the first dog company or to provide more activity and exercise for your first dog. A second dog should never be used to replace quality time playing and exercising with your dog.
Step 3:
Be sure that your current dog will be able to adapt to a new dog. Consider her behavior, personality, socialization and how she reacts to other dogs. If your dog is shy, fearful, protective or jealous, she may be miserable if you add a second dog. If your first dog has behavior problems, the new dog can learn those behaviors from the first dog, exacerbating the problems.
Step 4:
Expect more challenges if you travel with your dog. Traveling with one dog can be a challenge, and traveling with two dogs can often be nearly overwhelming. Unless you have a large vehicle, space will be at a premium. Many motels will allow one dog but won't allow two. If you board your dog, the expense will be doubled.
Tips & Warnings
Be very careful about adding a second dog if your first dog is elderly or has always been an "only dog." In this case, the first dog may not be able to adjust and may become miserable and aggressive.