People are awfully sensitive about their dogs, too. I upset some guy that I quite liked, by calling his dog 'it.' I call my cats 'it' more often than 'she.'
Once, working for the vet, I interposed myself between two dogs who were starting to fight in the waiting room. Leading the instigator and its owner away I remarked, sympathetically I thought, that it's very difficult to socialize terrier-breed dogs like that one to not be aggressive to other dogs, especially as the developmental window-of-opportunity for that occurs before the puppy is fully vaccinated and can safely meet strange dogs. The man complained to my boss, who upbraided me for criticising the clients.
Here's a prime one: I was in the dispensary, counting out antibiotic tablets. My boss the vet wanders by and says, "I was on that antibiotic once." I replied, "I certainly hope not, this one isn't approved for humans, it makes some people go blind. You were probably on," and named another, very similar antibiotic that is used in humans. It took about two days before she stopped acting angry to me. I still don't understand why anybody would consider this a breach of 'proper' social-rank-behavior and find it offensive instead of being happy that I knew something about the drugs we used. Madness.