I’m pretty cynical, but this is a new level.
Accepting death as a part of life is in no way cynical, it´s logical.
My dog lives longer and shelters get more crowded?
Don´t think only of yourself, try to see the bigger picture. Not just your dog will live longer, a lot of dogs will with that drug, resulting in less adoptions. Since commercial breeders are not going to "produce" less dogs just because of the new drug, the result of dogs living longer will be a higher population of dogs. Now considering the number of people who want to adopt a dog will decrease while the number of dogs available will increase, this will necessarily result in more dogs who don´t find/have a home. It´s really quite obvious if you think about it.
the article seems to indicate that the pill will give a dog more “active years” and not necessarily more years
The article indicates both as far as I comprehend it:
"Biotech company Loyal is developing an injectable drug, LOY-001, designed to help large breed dogs not only live longer, but stay healthy longer"