My male GSD played rough with my golden puppy to. I would step in if I thought it was to much, but for the most part I let them play. I will say that my golden has taken on GSD behaviors when he plays and how he plays. He handles himself quite well. I have an older golden and he doesn't play the same way. The puppy herds the male GSD just like the GSD did to him. It's not so bad that I stop it, it's the puppy's way of catching him. They are best friends and the GSD is always looking out for him, he took him under his wing.
Misty- Samoyed Mix, Tannor- Golden Retriever CGC
Robyn- GSD CGC, TC, Midnite-GSD CGC,TC, Brennan-Golden Retriever CGC, Batman-Husky/Greyhound , Apollo-GSD