Ashton and pregnant Mila Kunis were enjoying a beautiful day at the dog park when the pit bull attacked their dog -- Pit Bulls are terrible with other dogs
Ashton had to play the strong role -- think Berta -- and pull the attacking pit bull off his dog
There is a growing trend of 'member only' dog parks to segregate good dogs from pit bulls
Ashton stayed in character as Berta and had strong words with the dogs owner
