I think any sport sized dog will attack a little kid in the wrong circumstance.
They run away, they screech, they flop around, just like prey beasts. It really gets the dog in the red, sometimes. It can't be predicted. That's why we have leash laws.
My sweet little Aussie, never hurt a fly, got freeked out by a little boy, for no apparent reason, jumped straight up, and tried to nip his face.
Lucky the kid was swift, and she only skinned the back of his shoulder as he turned away.
Lucky for me. The dog left teeth marks, and I had to explain it all to the cops, why I was unable to prevent this even on a leash. "...ahem...well, ya see, Officer, it was like this...uh.."