Visit your local humane society first to see their senior animals. If you don't make a connection there, look into local shelters that cater to seniors. Shelters like Young at Heart really cater to older animals. They look into their health needs, make sure they get fixed and chipped. If you chose a shelter senior, you will only pay a nominal fee to all of the services the animal has received there. I think paid about 150 bucks for Honey Bear. That's a steal compared to what puppy mills and pet stores usually charge. Just know that if you choose an animal from a senior shelter, you can rest easy that the dog has been well treated and gotten the best medical care possible.