In my experience some dogs play and instantly create a pecking order and all goes well. Sometimes dogs have a bit more trouble letting another dog run the show, you can see this in dogs if you spend enough time with them. My dog is rarely a dominant dog he's ok with letting someone else running with his toy. And when I said that the dogs he normally plays with make noises or snap at each other that's pretty **** normal that's how they play there's a difference between dogs biting and attacking and biting and playing dogs don't have hands they have a mouth they use their mouth to meet, greet,play,eat,and bite. I think people are quick to jump to conclusions. When ranger plays with his usual buds they always have a toy out and whoever gets it first gets it there's never ever a fight over it.