Two Companions Per Dog Perk

Even though I don't have any bones, I would like to suggest that there should be a perk, so that when you buy it, you are aloud to put two companions on one dog.
Today, I wanted to put a companion on a dog that already had one, but found out that you can only put one per dog. I mean, I would suggest that you could put on unlimited companions per dog, but I want this site to be fair (sorta xD), haha.
Or, like another thread, you can put on multiple companions but only let one have an affect and let the others just me accessories.
Comments would be very appreciated!! =)