[spidey]

I have been the other dog owner in a situation like this. My older Nottweiler isn't dog aggressive in a general sense (he loves most dogs), but he is reactive and certain kinds of dogs (BC's and those BC-like working type Aussies you see a lot in agility) push his buttons and that plus the excitement of agility can send him over the top and he went after a dog like that in class once. ONCE. And it was barking and snarling and growling, not true intent to harm. However, after that, he was on lead in class and I still do not run him off lead unless he is the only dog in an enclosed area. It can happen that you have a dog who isn't "dog aggressive", but who goes after *a* dog for whatever reason (and agility with all those dogs and people running and making noise can be EXTREMELY overstimulating), so perhaps there is an excuse for this happening once, but twice is unacceptable as far as I'm concerned. I would have a word with whoever runs the facility about this, this is a great way to put a dog off agility in a permanent way, not to mention potentially very dangerous to humans AND dogs.