I only remember when I was a kid, my parents in charge of our dogs care, they ate crap grocery store food, they roamed the neighborhood, they slept in our beds, never went to the vets, and lived to ripe old ages..
I agree with you Diane!
30 yrs ago dogs were fairly healthy and usually seemed to be of good temperament, not over reactive and quite social.
My first GSD(1980) was from a newspaper ad, a dairy farm had a litter. He was healthy, no allergies and was what the breed standard describes for temperament. Stomper lived to 11/ died of bloat. He was from 'pet lines' pure black, mom was black and tan, no angulation.
My step dad had two GSD's in the 70s, one white and one black and tan, both were healthy dogs with good temperaments, though they were used as watchdogs for his towing service station so socializing was controlled. When they were out with people they knew, they were normal dogs. Behind the fence they were all business(he had an impound lot)
I personally think some of the micromanagement and environmental influences are causing the health and temperament to be stressed and weakened. Allergies seem to be cropping up everywhere, and I don't blame the pedigree, but the environment. Immune systems seem to be weaker too.
The breeder I got my current male from has a decent track record~ beating the odds~ dogs are healthy and have great temperaments...though they are careful in planning their breedings.