Lol in collab terms I mean for conversations like 

Oh hey how's it going
Good good, how's the ranch?
Not bad, but I think the weasels are at it again
Oh is that so?
Yes, yes indeed. Tearing through the feed like demons. She pondered the idea of demonic rodents and found her self shuttering at the idea.
Well, thank heavens we have a priest should they truly be demons.

Like that kind of thing should definitely be collabed lol. But if you're writing about what the character is doi on their own time or interactions between your own toons, then keep it in one solo post