One of the biggest problem that Veterinarians see is the older human (thinking they are still as young as the last time they had a puppy), either picking the same breed (because they were so wonderful), and/or picking the dog they "always wanted as a kid", and thus pick the completely wrong dog breed to match who they are NOW.
We always advise, consult your veterinarian BEFORE you buy or rescue the next pet.
For example, you are not as young as you were the last time you had a pup! Thus the exercise, the feeding, the housetraining, the general training, etc is not as easy as it was when you were young. Patience, stamina, time, all figures into making the new pup a "reincarnation" of your previous pet.
You may now live an over 50 community. Large dogs may not be allowed. You may have physical or medical issues that preclude you from exercising, training, or even walking a large dog at your age.
-- Dr Mark Newkirk, Newkirk Family Veterinarians
About the Author: Dr Mark Newkirk is CEO, owner and operator of Newkirk Family Veterinarians. Serving pets for 3 decades!