--PLEASE DELETE

@w_Whoa, yes it is a bit odd, but I don't think that a pet's personality is taken (much) into account on something like this. I think the attractor that this lot trait has overrides an animal's personality traits.  Besides, in real life, even more solitary dogs are still social animals compared to many other types of animals just because of the fact that they are dogs! 😇  In your game the less social dogs will still hang out with the group, they just probably are less happy and more stressed than the super friendly and loyal dogs.

You can also do a test in the same Save Game as this house and just put the Cat Hangout trait on the lot and see if you get any groups of cats that way!🤔 (Or you can temporarily take the Dog Hangout trait off of your current lot and see what happens to the cats in your current household lot.)

Yeah, I would hope that this wouldn't be a game-changing issue for you! 😃  A bit strange and annoying, but entirely livable! 🐶🐱