I used to have a dog who was very friendly, she always wanted to go say hi to a new friend, no matter the species. But once she’d said hi, she suddenly turned into a big introvert and didn’t want to play. She’d shy away from a new friend if their energy level was high at all. She loved just hanging out and sniffing, but no play please. And the annoying thing is, she never learned which dogs and nice and which aren’t. There was a neighbourhood dog who was a complete asshole and would always growl at every other dog it met and pull at its leash to try and go bite them. Its owners were very pleasant and very sorry their dog was such a dick. But my dog never learned her lesson, and would always want to go say hi to the asshole dog. Then it would growl at her, and she’d shy away and say “Mindtraveller I’m scared”, and I’d comfort her and tell her it wasn’t her fault. And she never learned that that dog was just an asshole and there was no chance of the two becoming friends.