From what we see, #5 is a big problem with the pet owners, whose pets are their kids.
They spend a lot of time and effort finding the right person to take care of their pets when they are on vacation.
One of our childless neighbors with pets lost her regular pet sitter and paid good money for someone else. When they returned from the vacation, I noticed their dog was very shy and hangdown around my wife and I. That was not his normal behavior.
I asked them if their dog had a different sitter, and they said yes. To make a long story short the pet sitter’s son was an abusive drunk sob, and scared the pets his Mother watched.
One of our widow church ladies makes good money watching homes and the pets of the home owners. She is in high demand.
We either take the dog with us or she stays with my Mom or my sister. Our dog was dumped out as a 6 month old puppy on the street in our neighborhood. If we take her anywhere unknown to her she thinks we are abandoning her and she won’t eat.