I have a character named Baskerville, an intelligent shapeshifter who can alternate between a humanoid and fully-canine variation of a big black dog. He is verbal in both forms and just as smart as any human, and in fact usually on the sharper end of the spectrum. The problem is that, instead of completely going to sleep, only the human part of his brain does. He spends about 8 hours a day, usually starting at dawn, with the intelligence and personality of a literal dog. He generally shifts back to his fully-canine form before this happens whenever possible. It's still him, it's not an alternate personality, and he remembers what he does. He's just a lot dumber and a lot more instinctual for those 8 hours. He has friends, more human friends, who don't have this problem. And I'm trying to get in the headspace of how friends who are used to hanging around him would treat him while he's in dog-brain mode. Assuming that Baskerville's perfectly used to doing dumb, dog-like things while he's in dog-brain mode and it's not a question of them acting as his handlers and keeping him from serially humiliating himself, I'm just struggling to wrap my head around how you'd act around a dog that used to be your intelligent friend and equal, and will be again in a few hours, every day.