Yeah at this point I hope they never use Red again, just so I can continue to ascribe to the theory that he was adopted REALLY quickly, perhaps as soon as the very next Adopt-A-Thought Saturday.
(BFAHP is canon only in a sort of parallel-universe sort of way, since we know that Ivan and Berry for example wouldn't normally be walking around the House.)
I mean yeah I want to see him again, but if they DO use him again, it better be for a specific purpose, not just as a walk-on that any other background IF could have done. And who knows, they may have changed their mind since that comment Lauren made about them having no specific plans to use Red again, and perhaps he will have an ep in Season 5, or 6 (or later!).