Just the bare minimum of obeying commands like sit, stay, come, no and so on combined with a general demeanor conducive to humans enjoying having the dog around. I have been around very pleasant small breeds, but they wouldn’t take commands. Granted, this is less important for purpose bred rodent destroyers used for that purpose, but the vast majority are no longer used specifically for that reason.
Freegards
Oh, well, you haven’t had the blessing of meeting our small breed dog.
He not only follows Sit, Stay, come, No, Drink Water, All done (sign language) ... but, he also behaves like a true gentleman and lets ladies enter through the door first, AND, has a specialized bark for the tea kettle alert, if we’re on the other side of the house.
FReegards.