I allowed it because I am a rookie pet owner and never thought he was being that rough, but when the dog woke up the next day feeling that way, I realized it was too rough. I have never had a dog so I thought the dog was ok and it seemed like he was having fun playing so I thought if he didn't like it he would not keep going back to the friend who was playing with him like that. I am going to tell him.
Please don't judge - all of you saying "why on earth did you allow it?" have you never made a mistake? The person who was playing rough has two grown dogs so I thought he knew what he was doing. I never had a dog before, so I wasn't aware that this was too rough. If I was, I would've stopped it immediately, we love our puppy. If we didn't why would I have taken him to the vet? Let's stop the finger pointing and just answer the question. Thanks.