This is it, full stop. Dogs are individuals and should be treated as such.
I helped raise and home two litters of Staffordshire pups, we kept a rigorous list of the owners that we interviewed and checked the homes once a year to monitor the dogs progression. We made the owners sign a contract stating that if the living standards weren't up to snuff, we could reclaim the dogs. I worked with a fellow who raised Staffies for 30 years. In two litters, we had around a dozen well trained, friendly huggable porkchops. Two litters that had no recorded bites past a few months old (puppys nibble but can be trained), and showed no aggression with other animals. All those pups lived to old age, and passed in happy homes. I've also met too many pitbulls that were beyond any help i had to offer. Damaged dogs damaged by poor parenting.
I know my story is anecdotal, and i don't expect to change minds here, but i cant stand the outrage against such lovable dorks when something like the chihuahua exists.
This is true, antibiotics are only effective against bacterial infection, not viral.