Yes absolutely. Don't know if pandemic related or not but I was out of the country for several years, returned in 2020 and I felt a really significant difference in how people communicated.
It feels more aggressive to me now but maybe some would say it's more direct. People disagree more bluntly now and I feel are less likely to give people the benefit of the doubt.
I find it quite anxiety-inducing as I feel conversations become a conflict out of nowhere.
The dog one for example - I think it's overly defensive to assume that someone commenting your dog was "cute as a puppy" means they think it's ugly now.
Puppies are generally seen as cute. The person was just saying that as far as puppies go, yours was particularly cute. They probably still think the adult dog is cute but people love puppies so it's not a crazy thing to say.
Even if they don't think your adult dog is the cutest they've ever seen, it still seems like their intention is to be kind about your dog.
Generally I'd give someone I liked enough to talk to about my dog the benefit of the doubt.
So even if it did feel a bit clumsy of them to say, I might have said "yes I know he was so adorable then. Well I still think he is cute now obviously but I know what you mean. Hey do you remember Jens puppy with the little beard thing? How cute was he? Do you hear from her anymore?"
It's still pointing out that your dog is cute now but is a sort of polite conversational dance that everyone I knew did growing up that I guess saves face for both parties. You say it, move right past it and continue the conversation in a friendly manner.
To be as blunt as OPs examples does feel like the person is shutting conversation down and feels awkward to me.