Getting to know folks

I used to believe the best way to really get to know somebody was to share an inheritance with them. That's still probably true, but very limited usefulness since there are too few people I share an inheritance with...There is another useful tool, though, and a larger subset of the population----dog owners.
This is NOT an absolute. It's just clue, sort of a 'heads-up'. I can already think of exceptions to this, so I'm open to other views on this.
People with happy dogs are pleasant people. If I run a 911 call to someone's house and the retriever brings me a tennis ball, it's a good bet those are going to be kind, compassionate people. If the family dog is something vicious, they will be suspicious edgy type folks. Be careful. If they have small yappy dogs, they will be loud, close talkers and not good listeners. Maybe they've gone deaf. I've noticed people with hyperactive dogs tend to be fitness minded; I haven't made the connection yet as to why.
If you own cats, you're staff. Snakes, spiders, scorpions--- If you are an adult and your life revolves around these as pets, I'm going to keep my distance. Fish people live a long time.