Overall, an agility show is cool. Not so hot on the attack aspect there.
If its actual police/K9 units it make sense. That is part of what they are trained to do.
I think it’s a mix of police dogs and “civilian” canines. Not sure if the attack bits are exhibitions or if it’s a split competition or what,
Looking more like it’s all law enforcement dogs of some kind. Just saw a promo in which they discussed a 14” tall shorty bulldog who was competing after being paralyzed by a tick bite.
And I have seen any in the promos, but I know they use some smaller dogs- like beagles- for contraband detection and search & rescue. And those fellas DO get agility training.