Here's what happened & the vet wasn't unable to figure it out & gave me no ideas at all. Juno attended his first puppy socialization....random dogs that we didn't know. He played for about half an hour or so...then this dog who had been playing it rough the whole time & had a bunch of time-outs ran and kinda jumped on/over(like a fall?) Juno by his neck area and then he went from sta…