Another "I wish I knew how to do this" request: clicking on ('activating') a junkyard dog would automatically open the barter menu.
There are so many custom armor and accesories for dogs, but Dogmeat seems to be the only character I could equip with this gear. I can try to pickpocket junkyard dogs, but it's impossible not to get spotted and I can't actually equip the dogs with those items (I can wait a couple of days, but they would probably equip the armor with the highest DR).