But this dog seemed friendly. He even came up to me to pet it. The dogs were simply playing. Something snap and the dog became very aggressive pinning my dog down like you see in police dogs taking down a criminal. It went from being totally normal to aggressive tonormal again in seconds. Thereissomething seriously wrong in that dog.

That's why I picked a female and the smallest in the litter. She'll never be the aggressor. Usually she likes to be chased and sometimes other dogs will automatically join in and be aggressive (chase instinct) and what she will do is run straight into the thickets where other dogs won't follow. But yesterday, it was so sudden it even caught her off guard.