I agree, my gsd always hones in to her own breed, and these are the only dogs she tends to actually play with, rather than tolerate. She behaved the same when we had mirrors on the floor during our move, she was totally unphased by seeing herself in there and seeing she didn't look anything like me

Ok, then change it to ...it's not good for dogs to only be trained with dogs that all look the same.....

Agreed Catrinsparkles. Big puppies need to learn to play gently and little puppies need to learn not to be afraid of bigger dogs. They need to learn this in a supervised environment during the imprint period preferably.

Following on from my last post, I also think that all pups need to have a good romp with pups their own size. They also need to be put in their place by a friendly adult dog after their puppy licence has expired to know where to draw the line.

Emma, found this whilst surfing. Quite a good idea to use at a distance so your dog doesn't work out it isn't real. Good for you initial BAT training maybe? Being able to change the toy dog's body language should be a good training aid ie move the tail from down/up to relaxed. As this dog will be frozen and probably your dog too, one of them has to make the first move.........LOL, guess which?
Your dog is going to eventually back off or look at you. Click and treat, move away and praise. You'll probably need a helper unless you are innovative. Anyway, may be worth a try?

http://www.youtube.com/watch?v=XdBrV8rQ_bo