What's your GSD like with other dogs? Behaviour

Believe me i really didn't want to do it, but having HD, and an entire bitch, don't want any chance of an accident, but if i could turn back the clock ,i would and leave them on, as i do think he has the right raving hump over it ,

Flame is generally a very sociable girl and loves playing with other dogs. She can get a bit grumpy with dogs who get in her face though.

castration also seemed to make duke worse with other dogs. he was great with bitches before i had him done and now he doesn't care and will go for a bitch or a dog

It sort of puts a damper on the vets recomendation for casteration dosen't it
Think next time i will just put a kennel and run up to keep them seperated,or just stick to working bitches lol