What if a family brought their adult dog to a shelter because they got a puppy? Would that bother you?
What if the reason they brought the adult to the shelter was: "I don't believe in veterinary care so we got a new puppy"?
This really happened. A man brought in his lab because they got a puppy. To add insult to injury, the man noted that the dog doesn't seem quite right. The poor dog has inflamed and infected teeth! His mouth must be very sore. It's hard to believe but true.
Another true story. A man wanted to adopt a German Shepherd but the dog hates cats. So the man was willing to give his cat to his mother so he could adopt the dog. That isn't as bad as the first scenario but bad enough that I wouldn't want him to adopt our dog.
Shouldn't pets be adopted for the life of the pet?