Just a small suggestion, but I would really appreciate an icon or some kind of identifier on companions letting you know if you already have an identical one equipped to one of your wolves. I do like being able to equip multiple of the same companion to different wolves; but in my case I'm trying to avoid doubles to really make each pairing unique.
It doesn't take long now to scroll through who already has what equipped, but as the site ages and dens get larger, I worry that it will become more and more difficult to keep track.
As an alternative to icons, I think it would be neat if you could click or hover on a companion in the companions page and it would show what wolves currently have that one equipped! That way, again, as dens get larger, they would be quick and easy to find!