Is it really an issue? As long as the animal is happy, I don't see the problem of a shorter lifespan. You can simply (and sadly) have it put down in an humane

Is it really an issue? As long as the animal is happy, I don't see the problem of a shorter lifespan. You can simply (and sadly) have it put down in an humane way once it starts to get health issues. Plenty of pets don't make it past 8 years.