3) Seniors may be less expensive
Owning a Shih Tzu is a big expense. You have to consider vet bills, food, toys, and other necessities. When you purchase a puppy or young dog, prices can be much higher. Not only do you have to pay an expensive adoption fee, but you may also have to pay for spay/neuter surgery, microchipping, and other expenses. With a senior dog, you can avoid many of these expenses if the previous owner or the shelter or rescue has already paid for these services. Plus, the cost of adoption will likely be much lower.
